Use a halter over their head and face. A sheep can be held for bleeding, shearing or hoof trimming by sitting the animal up on its hind end, leaning back against the restrainer. For long term restraint of sheep in the laboratory, a canvas sling and rack is available from several commercial suppliers. Animals are easily acclimated to such slings, and can be comfortable and relaxed enough to fall asleep in them. By Dr. Jack Risdahl Pigs in general are friendly and docile but will react severely to poor handling or a stressful environment.
Pigs can be very vocal.
If pigs are chronically stressed they will become skittish and fearful. Handling and restraint in pigs relies greatly on treating the pigs in a humane manner. The benefits of treating pigs well include reducing apprehension, fear and stress in the pigs. There are several levels of restraint and handling, from touching and coaxing a pig to restraining a pig for chronic procedures. Touch is a very important aid to good husbandry.