bluuebunny/crossref_metadata_2025 huggingface dataset:
‘Pleasures’,'Pains’ and Animal Welfare: Toward a Natural History of Affect
Authors: Fraser D , Duncan I J H
Published: January 2023

In hedonic theories of motivation, ‘motivational affective states’ (MASs) are typically seen as adaptations which motivate certain types of behaviour, especially in situations where a flexible or learned response is more adaptive than a rigid or reflexive one. MASs can be negative (eg unpleasant feelings of hunger or pain) or positive (eg pleasant feelings associated with eating and playing). Hedonic theories often portray negative and positive MASs as opposite ends of a one-dimensional scale.

We suggest that natural selection has favoured negative and positive affect as separate processes to solve two different types of motivational problems. We propose that negative MASs (eg thirst, fear) evolved in response to ‘need situations’ where the fitness benefit of an action has increased, often because the action is needed to cope with a threat to survival or reproductive success. We propose that these negative MASs develop in response to a change in the body (eg dehydration) or the environment (eg the approach of a predator) which creates the need for action, and that negative MASs can become intense and prolonged if the threat to fitness is high and persistent. We propose that positive MASs evolved in ‘opportunity situations ‘ where an action (eg playing, exploring) has become advantageous because the fitness cost of performing it has declined. We propose that these positive MASs occur during, or as a result of, the performance of types of behaviour which are beneficial for fitness at a variety of times, not only when they are required to meet immediate needs; and that the pleasure inherent in the behaviour motivates the animal to perform it when the cost of so doing is sufficiently low. Some behaviour (eg eating) can be motivated by both positive and negative affect. Other behaviour, such as playing or fleeing from a predator, may be motivated largely by positive or negative affect alone. Our hypothesis needs to be tested, but we suggest that it corresponds well to common human experience.

The hypothesis provides a basis for predicting whether an aspect of animal management is likely to cause strong and prolonged negative affect (‘suffering’), or to prevent animals from experiencing certain types of pleasure. This distinction is important for bringing animal welfare assessment into line with ethical concerns.
Environmental Enrichment for Australian Mammals
Authors: Murray A J , Waran N K , Young R J
Published: January 2023

Many of Australia's nocturnal mammals are rare or endangered in the wild. The behavioural integrity of captive populations of endangered species can be maintained through the application of environmental enrichment techniques. This study investigated the effectiveness of feeding enrichment in promoting behavioural diversity, enclosure usage and species-typical behaviours in the ghost bat(Macroderma gigas)and the yellow-bellied glider(Petaurus australis). Animals were observed for 300 min day-1 over three consecutive time periods: baseline (12 non-consecutive days); enrichment: (12 consecutive days); and post-enrichment: (12 non-consecutive days). The use of a live insect dispenser decreased grooming and increased out-of-sight and social behaviour in the ghost bat. Artificial gum trees promoted species-typical behaviours in the yellow-bellied glider. Enrichment for nocturnal mammals had variable results and different welfare implications for these animals.
Editorial
Authors: Kirkwood James K
Published: January 2023

This issue of Animal Welfare takes the journal into its eighth year. It has a gratifyingly high Science Citation Index impact factor (the index of how frequently papers published in scientific journals are cited which is widely taken as an index of quality) of 0.909, which places it very well up the ranks of both veterinary and zoology journals. This, and the relatively short mean interval from acceptance to publication (c 9 months), make the journal increasingly attractive to authors and the number of manuscripts submitted continues to grow. It is pleasing also that the journal has a worldwide uptake and readership and that subscriptions continue to increase.
Travel Sickness and Meat Quality in Pigs
Authors: Bradshaw R H , Randall J M , Forsling M L , Rodway R , Goode J A , Brown S N , Broom D M
Published: January 2023

An experiment was conducted to investigate the incidence of travel sickness in pigs, specific hormone concentrations at exsanguination and subsequent meat quality. Fifty, 80kg slaughter pigs were transported on a lorry for 4.5h. During the journey, behavioural observations of the individually marked pigs were made by scanning every 8min to establish whether the pigs exhibited certain symptoms of travel sickness (foaming at the mouth and chomping) and incidences of retching and vomiting were noted as they occurred. Upon arrival at the slaughterhouse, pigs were unloaded, slaughtered immediately and a blood sample was taken at exsanguination for analysis of plasma Cortisol, beta-endorphin and lysine vasopressin concentrations. On the day following slaughter, the chilled carcase of each pig was assessed for meat quality (using pH, Fibre Optic Probe, and Tecpro Pork Quality Meter measurements) in the longissimus dorsi, semimembranosus and adductor muscles to determine the incidence of PSE (pale, soft, exudative) or DFD (dark, firm, dry) meat quality. Twenty-six per cent of the pigs (a total of 13 individuals) vomited or retched during the journey. There was no relationship between the incidence of travel sickness and either the concentrations of the hormones analysed at exsanguination or subsequent meat quality. Correlations revealed no significant relationship between concentrations of the hormones and meat quality measurements.
Animal Welfare Special Issue on Genetics and Animal Welfare
Authors: van Zutphen LFM , Bedford P G C
Published: January 2023

The November 1999 issue of Animal Welfare will be published as a Special Issue, devoted to the topical subject of Genetics and Animal Welfare. The journal has established itself as the objective, international forum for quarterly publication of peer-reviewed papers on all aspects of farm, laboratory, zoo, wild and companion animal welfare science - from practical husbandry to ethical debates. In 1998, it ranked in the top 25 per cent of all veterinary/zoological journals covered by the Science Citation Index® - attesting to the quality and impact of its contents.
Preferences of Growing Fowls for Different Light Intensities in Relation to Age, Strain and Behaviour
Authors: Davis N J , Prescott N B , Savory C J , Wathes C M
Published: January 2023

The preferences of broiler and layer strains of fowl for four different intensities of incandescent luminaire (6, 20, 60 and 200 lux; Osram, 60W, pearl) were tested at 2 and 6 weeks of age. With each strain, four replicates of 12 birds were each allowed to move freely between four compartments illuminated continuously at the different intensities for 6 days. The distribution of light intensities among the compartments was changed daily. After 2 days of conditioning, the birds’ location and behaviour were recorded once every 15min over 23h on each of the remaining 4 days. The other hour was devoted to changing light intensities and refilling the feeders and drinkers. Six, mutually exclusive behaviours were defined: resting, perching, feeding, drinking, litter-directed activity and locomotion.

With both strains, most time was spent in the brightest (200 lux) environment at 2 weeks of age. but in the dimmest (6 lux) at 6 weeks. This apparent change in preference was associated only with the two behaviours which took up most time, resting and perching, whereas the highest intensity was consistently preferred for all other behaviours. Older birds thus preferred to be in dim light when they were relatively inactive.

The finding that older birds prefer to spend much of their time in a light environment of < 10 lux intensity, depending on behaviour, is contrary to current recommendations that minimum light intensities for broilers and laying hens should be increased to as much as 20 lux. Some variation in the spatial or temporal distribution of ambient light intensity, to provide both dimly (< 10 lux) and brightly (eg > 50 lux) lit environments, might benefit the welfare of older poultry, although further work is needed to establish their optimal light environment.
A Breeding Goal to Improve the Welfare of Sheep
Authors: Scobie D R , Bray A R , O'Connell D
Published: January 2023

A polled sheep with a short tail, and devoid of wool on the head, legs, belly and breech, has been proposed as a breeding goal (Scobieet al1997). This paper examines the practical and welfare implications of such an objective. Mean shearing times were significantly (P < 0.001) slower for control Romney (97s) and Coopworth (88s) ewe hoggets compared to times for both breeds after they were ‘trimmed’ to resemble the breeding goal (47s). Romney wethers were slower to shear than ewes (P < 0.001), but trimmed wethers (53s) were much faster to shear than the untrimmed controls (99s). Trimmed sheep produced less wool (pooled mean weights of fleece wool for trimmed sheep vs total wool for controls being 2.5 vs 3.5 kg;P< 0.001), half the difference (ie 500g) consisting of lower value oddment wools from the untrimmed controls. Tails were docked to 0, 20, 40, 60, 80 and 100 per cent of the distance between the base of the tail and the hock of Perendole lambs, and 0, 20, 40 and 60 per cent on Coopworths. More dags accumulated as the tail stump increased in length, although significance was dependent on the time of year and management system. No flystrike (cutaneous myiasis) was observed in Perendales given physical and chemical protection, while a small proportion of all tail lengths were flystruck in Coopworths given only physical protection. When shorn as hoggets, the time taken to shear Perendole ewes increased with increasing tail length (P < 0.001). Provided the undocked short tail is bare of wool, the proposed breeding goal should deliver an economic solution to sheep breeders attempting to satisfy markets conscious of chemical residue and animal welfare issues in the new millennium.
Transport of Deer: A Review with Particular Relevance to Red Deer (Cervus Elaphus)
Authors: Weeks C A
Published: January 2023

Farmed deer, of which the predominant species is the red deer (Cervus elaphus), are increasingly transported to abattoirs for slaughter rather than being shot at pasture. In order to satisfy meat hygiene and marketing requirements, the welfare of deer is often reduced because all farmed animals are stressed by commercial transportation. Several recent experimental studies (reviewed here) have found the magnitude of behavioural and physiological responses of deer to many aspects of handling and transport to be similar to those measured in other farm species, particularly ruminants. Thus, their welfare appears not to be unduly compromised despite their comparatively recent domestication. Deer are, however, particularly flighty and require specialized handling facilities and equipment, the key features of which are summarized.

Legislation covering transport of deer is already operative in many countries with the aim of safeguarding deer welfare. However, the responses of deer to commercial transportation have not yet been measured scientifically. This primary information is needed before a full assessment of the effects of transport on the welfare of deer can be made. Thermal conditions during transit are of importance for deer welfare and these have not been measured, either under experimental conditions or during commercial journeys.
Animal Welfare vs Free Trade - Free Trade Wins: An Examination of the Animal Welfare Implications of R v Ministry of Agriculture, Fisheries and Food exp Compassion in World Farming (1998)
Authors: Brooman S , Legge D
Published: January 2023

The European Union (EU) has often been regarded as a prime mover in the cause of improved animal welfare. There is a great deal of European legislation to support this contention. This article discusses a recent case brought by the UK Government under Article 177 of the Treaty of Rome 1957 which challenges the assumption that EU law always favours animal welfare. We suggest that free trade is the driving force behind EU legislation and that where this conflicts with animal welfare, free trade is usually preferred.
Repetitive Backflipping Behaviour in Captive Roof Rats(Rattus Rattus)and the Effects of Cage Enrichment
Authors: Callard M D , Bursten S N , Price E O
Published: January 2023

Repetitive ‘stereotyped’ behaviours are often performed by both wild and domestic rodents in small laboratory cages. In this study, a behaviour resembling a backwards somersault or backflip is described and quantified in captive roof rats (ship or black rats,Rattus rattus). Videotapes of captive-bred rat pups showed that repetitive backflipping developed rapidly after weaning. In all subjects, the behaviour was highly cyclical, with more than 90 per cent occurring during the dark phase of the light:dark cycle. Individual variability in the performance of backflipping was considerable but performance levels for each individual were consistent from day to day and at 30 and 60 days of age. Highly significant differences were found between litters (families), indicating important maternal and/or genetic effects on performance levels. Cage enrichment in the form of a wooden nest box resulted in dramatically lower rates of performance. Increased cage height resulted in delayed development of backflipping, as well as changes in the form of the behaviour. Results are consistent with the hypothesis that the development and expression of backflipping in young roof rats may be triggered by weaning and maintained by a heightened state of arousal in a relatively impoverished environment with limited opportunities for perceptual and locomotor stimulation.
Alarm Pheromones in Urine Modify the Behaviour of Weaner Pigs
Authors: Amory J R , Pearce G P
Published: January 2023

Pigs undergoing an alarming experience may produce olfactory stimuli (pheromones) in their urine, which may have consequences for the welfare of other pigs exposed to these stimuli. Twelve young adult female pigs (gilts) were restrained for 30min in feeding stalls (a potentially alarming experience) and any urine produced was collected. Six gilts had previously experienced the procedure (experienced gilts), and six gilts had not (inexperienced gilts). The gilts’ behaviour was recorded over the 30min period. The inexperienced gilts exhibited significantly more escape behaviour (P < 0.001) and less exploratory behaviour (p < 0.05) than those which had prior experience of restraint.

Twelve weaner pigs (30 days old) were subsequently individually exposed to the urine from inexperienced gilts, the urine from experienced gilts and a water control in an open field test. The ambulation score in the open field test was significantly higher (P < 0.01) when weaners were exposed to the urine from inexperienced gilts compared to the other two treatments. The weaners were then presented with a feeder containing feed sprayed with the treatment samples. The weaners took significantly longer to approach the feeder sprayed with the urine from the inexperienced gilts (P < 0.05) and performed significantly more eating bouts (P < 0.05) that were significantly shorter compared with the water control (P < 0.05). Total number of vocalizations (P < 0.01) and grunts (P < 0.05) were significantly greater in those pigs exposed to the inexperienced gilts’ urine. These results indicate that urinary alarm pheromones were produced by the inexperienced gilts during restraint in the feeding stall and that these pheromones significantly modified the behaviour of weaner pigs subsequently exposed to them. Exposure to such pheromones is likely to adversely affect the welfare of pigs.
Assessing the quality of relationships in rehabilitating lar gibbons (Hylobates lar)
Authors: de Veer Monique W , van den Bos Ruud
Published: January 2023

Sir, Hereby we would like to describe a small project on rehabilitation in gibbons.

At the Gibbon Rehabilitation Project (GRP) Phuket, Thailand, lar gibbons (Hylobates lar) that have lived their youth as pets are being rehabilitated, with release as the final aim. Rehabilitation consists of minimizing human contact, encouraging conspecific contact, and giving appropriate food and opportunities to brachiate. After having been cages at the project for a period ranging from a few months to a few years, gibbons which are thought to have a good chance of surviving in the wild are moved to one of three islands near Phuket. As a semi-natural environment is thought to facilitate the process of rehabilitation, the islands are used as an intermediate between the cages and the wild. As a rule, only pair-bonded couples and groups of single (mostly immature) gibbons are moved to the islands. Pair-bonded couples because only they have a fair chance of surviving in the wild (Brockelman 1990); single gibbons because this allows them to choose their own partners.
Welfare implications of culling red deer (Cervus elaphus)
Authors: Bradshaw E L , Bateson P
Published: January 2023

Dr Bradshaw and Professor Bateson reply: We replayed slowly the video of the hounds catching up with the stag which fell during a hunt on 29 August 1995. After many viewings we were convinced that the hounds did bite the stag, although we have stated repeatedly that the control of hounds is generally impressive. Since we submitted our paper to Animal Welfare, a much clearer case of hounds biting a stag has been videoed. This was at Marsh Bridge on 3 April 1999. We doubt very much if this case can be denied or explained away. We do not think this matter of biting is central in the debate about the welfare of the hunted deer, but if it is to be settled, both videos should be analysed by independent experts nominated by the stag-hunts and ourselves.
Zoo Animals and Their Human Audiences: What is the Visitor Effect?
Authors: Hosey G R
Published: January 2023

The presence of human visitors has been shown to affect the behaviour of several different mammalian species in a number of different zoos, but the behavioural changes observed are not always consistent with a simple ‘stressful influence’ explanation. Data for non-primate species are too sparse to draw meaningful conclusions; but for primates, the evidence reviewed in this paper allows several hypotheses to be tested. Neither a social facilitation nor an audience attraction hypothesis can be generally supported by the available studies. However, these studies are consistent with a general stressful influence hypothesis, although the extent of this influence is itself affected by other variables, notably species and housing differences. There is some evidence that chronic exposure to human audiences may lessen this stressful influence in some species; and in certain circumstances (notably where some members of the public throw food) the effect of the audience is almost an enriching one.
An Evaluation of the Suitability of Contraceptive Methods in Golden-Headed Lion Tamarins(Leontopithecus Chrysomelas), with Emphasis on Melengestrol Acetate (MGA) Implants: (II) Endocrinological and Behavioural Effects
Authors: De Vleeschouwer K , Van Elsacker L , Heistermann M , Leus K
Published: January 2023

In order to be suitable, a contraceptive method should have little or no effects on social organization or behaviour. In callitrichids, changes in socio-sexual interactions between group members, due to hormonal changes induced by contraception, may have consequences for the reproductive inhibition of offspring in their natal group. This may lead to an increased rate of inbreeding. In this paper we report on the endocrinological and behavioural effects of contraception in golden-headed lion tamarins, using data obtained through a world survey and an observational study. Hormonal analysis of urinary oestrone conjugate levels in melengestrol acetate (MGA)-implanted females confirmed earlier preliminary findings (Van Elsackeret al1994): MGA implants inhibited reproduction through the suppression of ovulation and regular ovarian cycles in the implanted female, while the occurrence of ovarian cycles in the oldest female offspring of each group was not affected. Sexual interactions between the dominant adults still occurred but underwent temporal changes. Reproductive inhibition in female offspring was maintained. Social interactions between group members altered in a non-consistent way but did not have an impact on the stability of the study groups during the study. In principle, MGA implants do not have a detrimental impact on the behaviour of group members. The suitability of MGA implants from a behavioural point of view depends on the extent to which those involved wish to preserve the entire range of natural behaviours for this species. The behavioural effects of other contraceptive methods are still largely unknown.
Concluding Studies on the Failures of Electrical Lancing of Whales
Authors: Barnes G R G , Madié P
Published: January 2023

Electrocution of an animal is inhumane if it is not rendered instantaneously insensible by the application of sufficient current density within vital centres of the brain. Application of electric current which does not achieve this, is likely to cause severe pain. The humane aspects of electrical lancing have aroused widespread concern and debate.

For an electrically lanced whale of the size of those currently hunted, previous research has indicated that the current densities produced in the heart and brain are unlikely to reliably render the animal insensible or stop its heart. This study supports these findings and demonstrates that the presence of salt water/immersion may further reduce current densities. Evidence for the failure of the electric lance includes the necessity for multiple and prolonged applications of electric current.

Reasons for the failure of the electric lance include non-optimal current injection sites, insufficient current injected, the presence of salt water, and the trauma caused by the explosive harpoon. The efficacy of the electric lance may be falsely exaggerated for reasons associated with blood loss and misdiagnosis of death. All evidence clearly indicates that attempts to stop the heart by electrocution will cause severe pain to an already traumatized animal.

We suggest that the use of the electric lance is clearly inhumane, and are pleased to announce that its use in Japanese whaling operations was reportedly discontinued as from 1997.
Hooded Crows Solve a Transitive Inference Problem Cognitively
Authors: Lazareva O F , Smirnova A A , Zorina Z A , Rayevsky V V
Published: January 2023

We investigated the ability of hooded crows to form transitive inferences. Subjects were trained to discriminate a series of overlapping pairs of stimuli: A+ B-, B+ C-, C+ D-, D+ E, where the letters stood for colour stimuli and plus and minus for rewarded or non-rewarded choices. The stimuli were cards of different colours with a circle of the same colour on the reverse side and diameters decreased from A to E. To preclude an influence of the reinforcement history on choices with the test pair BD, an overcompensation phase was instituted after training. It consisted of the presentation of all training pairs with frequencies selected so that the reward to non-reward ratios for stimulus D would be between 1.5 and 2.0 times greater than for B. If, during the BD test, the bird chose the stimuli according to these ratios they should prefer D. If they chose according to diameter relation they should prefer B. During these tests, the crows strongly preferred B over D (83.1%). In a second experiment, subjects were trained with the same procedure except that the diameters of the circles were all the same. During this test, the performance of two crows was not significantly different from chance level (53.1%), and the other two crows preferred D (80.0%). We conclude that crows can solve transitivity tests using cognitive mechanisms if they are offered additional information (in this case circle diameter) which, presumably, allows them to represent the relevant stimuli in an ordered series.
Incentive Value Learning in Domestic Hens
Authors: Coerse N C A , Haskell M J , Forkman B
Published: January 2023

The incentive value learning theory states that the value assigned to a resource depends on the motivational state of an animal when it first encounters that resource. The present experiment investigated whether domestic hens, Gallus domesticus, assign different incentive values to a novel food depending on their deprivation state when they encounter this novel food. Hens were first trained to find a novel food type hidden under wood shavings in a large food dish. Then, after half of the animals were food-deprived and half left not food-deprived, all hens were re-exposed to the novel food in a small food dish in a second test arena. Next, all hens were food-deprived and then given access to the original food dish with wood shavings but no food in the original test arena. Hens that had been food-deprived before re-exposure spent more time looking, pecking or scratching at the wood shavings in the dish and pecked more at the dish than did the hens that were re-exposed while sated. The sated hens also tended to sit down longer in the test arena than did deprived hens. Thus, hens that had been deprived before re-exposure to the novel food searched more actively for the food than hens that had been sated before re-exposure, indicating a higher motivation. These results prove for the first time that incentive value learning occurs in domestic hens.
Early Environmental Experience and Transferable Skills in the Weaned Piglet
Authors: Cooper J J , Cox L N , Whitworth C
Published: January 2023

Early environmental experience can have significant effects on an animal's ability to adapt to challenges in later life. Prior experience of specific situations may facilitate the development of behavioural skills which can be applied in similar situations to later life. In addition, exposure to a more complex environment may enhance cognitive development (eg increased synaptic density), which can then speed the acquisition of new behavioural responses when faced with novel challenges (Grandin 1989).
Object Permanence in Young Hooded Crows and Budgerigars
Authors: Michnevich N V , Lazareva O F , Smirnova A A , Zorina Z A , Reznikova JI
Published: January 2023

One of the basic components of animal perception and cognition is the understanding that there are invariant physical properties attached to objects in the world. The most commonly discussed aspect of object-concept is object permanence - the notion that objects are separate entities that continue to exist when out of sight of the observer (Piaget 1952; Krushinsky 1990). Pepperberg (1990) showed that different species of parrot are capable of reaching Stage 6 (Piaget 1952) but nothing is known about object permanence in young birds.
Survival and Adaptation of a Released Group of Confiscated Capuchin Monkeys
Authors: Suarez C E , Gamboa E M , Claver P , Nassar-Montoya F
Published: January 2023

One commonly used method of managing confiscated wild primates in Latin American countries is to release rehabilitated individuals back to their natural habitats. However, little information has been collected from confiscated animal releases, so no clear guidelines have been developed to measure the success of this type of procedure. In most countries, the collection of critical post-release data is too costly and time-consuming for it to be incorporated into the routine procedures of institutions managing confiscated fauna. Therefore, this project was carried out in conditions similar to those of other Colombian and Latin American rehabilitation centres. A group of eight confiscated and rehabilitated brown capuchin monkeys(Cebus apella)was released in Los Llanos Orientales in Colombia, and monitored for 6.5 months to determine their adaptation and survival after release. Results were analysed according to how the animals adapted to their new environment in terms of foraging, feeding, locomotion, sleeping, social interactions between the group and with other animals and species, prédation, orientation, and establishment of a territory. The results show that the short-term adaptation and survival of the group 6.5 months after release was successful. Five of the eight animals remained together, two separated, and only one was lost during the first month. Implications for animal well-being are discussed.
The Effect of Increasing Dietary Fibre on Feeding, Rumination and Oral Stereotypies in Captive Giraffes (Giraffa Camelopardalis)
Authors: Baxter E , Plowman A B
Published: January 2023

Many captive giraffes perform oral stereotypies, in particular tongue-playing, licking of objects (including conspecifics) and vacuum chewing. Typically, the diet of these large ruminants in captivity consists mostly of food concentrates, which are consumed rapidly and do not provide stimulation for their long, prehensile tongues. In the wild, browsing requires extensive use of this organ but in captivity material upon which to browse is limited. Consequently, vacuum activities, such as mock leaf-feeding behaviour, and stereotypies may develop. Rumination is also a major component of a giraffe's behavioural repertoire. It is essential for proper digestion, but may also be connected with non-REM sleep. Inadequate opportunities for rumination may also contribute to the development of oral stereotypies. In this study of captive giraffes, we examined the effect of increasing dietary fibre on the time spent ruminating and feeding and the extent to which oral stereotypies were performed. Two giraffes of different age, sex and sub-species were studied at Paignton Zoo Environmental Park. Dietary fibre was increased by the addition of coarse meadow hay to their existing diet. Following the addition of hay, time spent feeding did not change significantly but there was a significant increase in the time spent ruminating and a significant reduction in time spent performing oral stereotypies by both giraffes, suggesting that oral stereotypies may be connected with rumination rather than feeding. Stereotypic behaviour is generally accepted to be an indicator of sub-optimal welfare. Thus, the reduction in this behaviour by the simple addition of coarse fibre to the diet can be interpreted as enhancing the welfare of these animals.
The Effect of Transport on Core and Peripheral Body Temperatures and Heart Rate of Sheep
Authors: Ingram J R , Cook C J , Harris P J
Published: January 2023

The effect of transport on core and peripheral body temperatures and heart rate was assessed in ten 18-month-old Coopworth ewes(Ovis aries)Manual recordings of core (rectal) temperatures were obtained, and automated logging of peripheral (external auditory canal and pinna) temperatures and heart rate was carried out on the day prior to (day 1) and during (day 2) a standardised transport procedure. Transport produced a significant increase in the rectal temperature, which declined following unloading. Peripheral measures of body temperature also exhibited changes with transport. However, both ear-canal and pinna temperatures declined during actual transport, reflecting to some extent the decline in ambient temperatures recorded externally by sensors on the ear tags of the animals. Peripheral measurement of temperature, particularly at the readily accessible ear canal, may offer potential as a technique for the long-term monitoring of thermal responses to stress. However, further research is required into the potentially confounding effects of ambient temperature and wind chill factors.
The Influence of Length of Time in a Rescue Shelter on the Behaviour of Kennelled Dogs
Authors: Wells D L , Graham L , Hepper P G
Published: January 2023

Animal rescue shelters provide temporary housing for thousands of stray and abandoned dogs every year. Many of these animals fail to find new homes and are forced to spend long periods of time in kennels. This study examined the influence of the length of time spent in a rescue shelter (<1 month, 2-12 months, 1-5 years, >5 years) on the behaviour of 97 dogs. The dogs ‘ position in their kennels (front, back), their activity (moving, standing, sitting, resting, sleeping), and their vocalisation (barking, quiet, other) were recorded over a 4 h period at 10 min intervals. The dogs’ behaviour was significantly related to the length of time the animals had spent in the rescue shelter. Dogs housed in the shelter for over five years spent more of their time at the back of their kennels, more time resting, and less time barking than dogs housed in the shelter for shorter periods of time. The age of the dog could not account for the significant results found, suggesting that environmental factors were responsible for the change in the dogs’ behaviour. The findings suggest that lengthy periods of time spent in a captive environment may encourage dogs to behave in a manner that is generally considered unattractive by potential buyers. This may decrease the chances of such dogs being adopted, resulting in longer periods of time spent in the kennel environment and the possible development of further undesirable behaviours.
Assessment of Return to Consciousness After Electrical Stunning in Lambs
Authors: Velarde A , Ruiz-de-la-Torre J L , Roselló C , Fàbrega E , Diestre A , Manteca X
Published: January 2023

The return to consciousness of 24 electrically stunned lambs was assessed by measurement of physiological reflexes and electroencephalography (EEG) recordings. The physical activity of the lambs after head-only electrical stunning included one tonic phase and two clonic phases. The tonic phase began immediately after the stun and ended 10 s after the stun; the first clonic phase started immediately after the tonic phase and ended 36 s after the stun, and the second clonic phase started immediately after the first clonic phase and ended 70 s after the stun. During the tonic phase and the first clonic phase, electrical activity recordings of the brain showed a dramatic increase in the relative power spectra of alpha and beta frequencies. Both frequencies returned to pre-stun levels with the end of the first clonic phase. During the second clonic phase, the relative power spectrum of theta frequency was higher than that before stunning. These results suggest that during the tonic phase and the first clonic phase, the animal was unconscious, whereas during the second clonic phase the return of some conscious function began. Spontaneous breathing returned at about 29 s post-stun, whereas the corneal reflex returned at about 38 s. It is therefore suggested that the return of spontaneous breathing is the safest indicator that the animal is close to recovering consciousness.
Voluntary Animal Welfare Assessment of Mass-Produced Farm Animal Housing Equipment Using a Standardised Procedure
Authors: Knierim U , Hesse D , von Borell E , Herrmann H-J , Müller C , Rauch H-W , Sachser N , Zerbe F
Published: January 2023

Assessment of mass-produced animal-housing equipment can serve as a basis for improving animal welfare. A number of European countries have adopted various legal approaches to such assessment. In Germany, welfare assessment of housing equipment is voluntary, but minimum standards can be set by regulation for the assessment procedure and for the qualifications of the persons involved. From a scientific perspective, the time and resource constraints pose some problems, particularly as they apply to a voluntary procedure. For reasons of practicability, certain compromises will be required. Nevertheless, it is important to ensure that each assessment procedure is based upon scientific principles and considers animal welfare aspects to a sufficient extent. A proposal for the minimum standards of an assessment procedure has been elaborated by the Animal Welfare Committee of the German Agricultural Society (Deutsche Landwirtschafts-Gesellschaft, DLG), a shortened version of which is presented here. The animal welfare impact of such a regulated but voluntary procedure will be less than that of an obligatory assessment; however, the relatively flexible approach may still significantly contribute to the improvement of welfare aspects of livestock housing.
A Questionnaire Survey of Ovine Dystocia Management in the United Kingdom
Authors: Scott P R
Published: January 2023

A questionnaire survey of farm experience, undertaken during lambing time in the year 2000 by 95 second-year veterinary undergraduate students, highlighted numerous areas of concern. On those farms attended, more than one third of shepherds (32; 34%) neither washed their hands in an approved scrub nor used arm-length disposable plastic gloves before attempted correction of a lambing problem. Sheep received a prophylactic antibiotic injection after an assisted lambing on just 33 farms (35%), while the majority of farmers (62 farms; 65%) treated only those ewes that became sick some days after assisted lambing. Veterinary assistance was requested to only 22 of 359 (6.1%) dystocia cases from a sample population of 79 610 lowground ewes. When lambs could not be delivered by farm staff the ewes were either humanely destroyed (65) or injected with antibiotics but subsequently died because of ensuing toxaemia from the emphysematous lambs in utero (272).
The Effect of Morphology on the Musculoskeletal System of the Modern Broiler
Authors: A Corr S , J Gentle M , C McCorquodale C , D Bennett
Published: January 2023

This study compares various morphometric features of two strains of broilers, selected and ‘relaxed’ (ie random-bred), raised under two feeding regimes, ad-libitum-fed and restricted-fed. We consider the possible consequences of the different body shapes on the musculoskeletal system. The ad-libitum-fed selected birds reached heavier bodyweights at younger ages, had wider girths, and developed large amounts of breast muscle which probably displaced their centre of gravity cranially. At cull weight, they had shorter legs than birds in the other groups and greater thigh-muscle masses; therefore, greater forces would have to be exerted by shorter lever arms in order to move the body. The tarsometatarsi were broader, providing increased resistance to greater loads, but the bones had a lower calcium and phosphorus content, which would theoretically make them weaker. Many of these morphological changes are likely to have detrimental effects on the musculoskeletal system and therefore compromise the walking ability and welfare of the birds.
Assessing Animal Welfare at the Farm and Group Level: The Interplay of Science and Values
Authors: Fraser D
Published: January 2023

In the social debate about animal welfare we can identify three different views about how animals should be raised and how their welfare should be judged: (1) the view that animals should be raised under conditions that promote good biological functioning in the sense of health, growth and reproduction, (2) the view that animals should be raised in ways that minimise suffering and promote contentment, and (3) the view that animals should be allowed to lead relatively natural lives. When attempting to assess animal welfare, different scientists select different criteria, reflecting one or more of these value-dependent views. Even when ostensibly covering all three views, scientists may differ in what they treat as inherently important versus only instrumentally important, and their selection of variables may be further influenced by a desire to use measures that are scientifically respected and can be scored objectively. Value assumptions may also enter animal welfare assessment at the farm and group level (1) when empirical data provide insufficient guidance on important issues, (2) when we need to weigh conflicting interests of different animals, and (3) when we need to weigh conflicting evidence from different variables. Although value assumptions cannot be eliminated from animal welfare assessment, they can be made more explicit as the first step in creating animal welfare assessment tools. Different value assumptions could lead to different welfare assessment tools, each claiming validity within a given set of assumptions.
Evaluation of Welfare State Based on Interpretation of Multiple Indices
Authors: Scott E M , Fitzpatrick J L , Nolan A M , Reid J , Wiseman M L
Published: January 2023

Welfare is a multidimensional construct and its quantification is of major scientific, societal and economic importance in veterinary medicine. The construction of indices that measure welfare validly and reliably remains a considerable challenge. A general methodology for constructing welfare indices can be adapted from human medicine (in particular, from methodologies to assess Quality of Life [QoL]) and modified to reflect the fact that all assessments of animal welfare must be observer-based. The methodology is based on the creation of individual, composite indices for distinct dimensions/domains of welfare such as pain, disease, or stress. The domains include behavioural, physiological and biochemical markers. We have established QoL methodologies in the assessment of acute and chronic pain in dogs and generalised this approach to farm animal welfare. We describe the development of a questionnaire with seven behavioural categories which are used to create a single pain score to assess acute pain in dogs. For chronic pain in dogs, a structured questionnaire with over 100 items has been devised, which the owner completes by indicating degree of agreement with each item using a seven-point Likert scale. The welfare measure includes pain as an integral component as well as husbandry, behavioural and physiological/biological measures. In each case, a profile of the individual indices can be studied and compared over time or among observers. These indices may also be combined to form a single composite welfare measure, should this be appropriate, using scaling models. In the welfare setting, we have both causal and indicator variables — and indeed, for farm animals, the causal variables may be sufficient cause for poor welfare (eg the presence of disease or inadequate husbandry).
Assessing Animal Welfare at the Farm and Group Level: A United States Perspective
Authors: Mench J A
Published: January 2023

The United States has traditionally lagged behind Europe in the adoption of voluntary or legislated standards for the care and treatment of animals on farms. US federal legislation of farm animal practices is minimal, confined to aspects of livestock transport and slaughter. Although some of the livestock and poultry producer (commodity) groups wrote guidelines, codes of practice, or statements regarding the humane treatment of animals in the 1980s, these were usually very general statements of current industry practice, developed with little consultation with independent experts and involving no mechanism for encouraging or ensuring compliance by producers. However, this has changed dramatically in the last few years, with an increasing trend among US retailers to require their suppliers to adopt minimum animal welfare standards. The major chain restaurants and supermarkets are working through their trade organisations, the National Council of Chain Restaurants and the Food Marketing Institute respectively, and with the commodity groups, to develop a uniform set of standards and a national auditing program. Standards and auditing programs have already been approved for dairy cattle, laying hens and meat chickens, and for slaughter, including ritual slaughter (kosher and halal). The process of setting auditable standards is complicated by the lack of legislative underpinning, the scope of the auditing that will be required because of US farm sizes and the large distances between farms, and the varying levels of expertise of potential auditors. For these reasons, ‘engineering-based’ auditing criteria that are relatively easy to measure and to standardise are more common. There are both strengths and potential weaknesses of retail-driven rather than legislatively driven animal welfare standards. Regardless, the recent changes in the US possibly pave the way for increasing dialogue between Europe and the US on farm animal welfare issues.
Integrating Parameters to Assess On-Farm Welfare
Authors: Spoolder H , De Rosa G , Hörning B , Waiblinger S , Wemelsfelder F
Published: January 2023

Given the absence of a ‘Golden Standard’ for the objective determination of welfare, the collection and interpretation of data involving different parameters is essential for assessing the well-being of farm animals. The choice of parameters and the relative weights assigned to each of them are crucial for the outcome of the assessment. Both elements involve a certain degree of subjectivity. In this paper we discuss the basics of different methods used to integrate welfare parameters, focussing on the issue of scientific objectivity. We begin by addressing parameter selection, the assignment of parameter weightings or rankings and the qualifications necessary for ‘experts’ designing and applying the methodology. Five different approaches to integrating parameters are then discussed. The paper does not state a preference for any method, but aims to encourage discussion of key elements involved with the on-farm assessment of welfare.
Measures of Developmental Instability as Integrated,A PosterioriIndicators of Farm Animal Welfare: A Review
Authors: Tuyttens F A M
Published: January 2023

Developmental instability, of which fluctuating asymmetry is the most commonly used and recommended measure, has recently been claimed to be an objective, integrated and retrospective indicator of animal welfare. The theoretical and empirical grounds for these claims are reviewed. In theory, carefully selected composite indices of fluctuating asymmetry are valid indicators of animal welfare in the sense that they reflect the ability of the developmental processes of an animal, with a given genetic constitution, to cope with environmental stressors. Relevant scientific experiments are scant and are mainly restricted to poultry, but they are on the increase and they largely support the application of developmental instability for assessing animal welfare. A scheme for monitoring farm animal welfare based purely on measures of developmental instability would have important advantages, but cannot be recommended yet. It cannot be ruled out that certain factors are clearly relevant to the welfare status of an animal but do not notably/proportionally affect its morphogenesis. Moreover, such a monitoring scheme would not be appropriate for applications with an emphasis on problem analysis/management.