## 1 Introduction  
Sustainable broiler chicken production can contribute to the United Nations' sustainable development goals to eradicate hunger and ensure good health and wellbeing through the supply of high-quality protein and microturtentirs in the form of meat and eggs [1]. It is for this reason that many broiler producers around the world have directed their focus toward optimizing carcass yield and meat quality traits by maintaining high broiler welfare standards, improving gut health, and minimizing locomotion disorders [2]. This has been achieved with prebiotics, probiotics, symbiotics, and phytogenics as viable alternatives to prophylactic and growth-promoting antibiotics. Probiotics are mono or mixed cultures of live beneficial bacteria that are employed in poultry production to create a balanced and diversified gut microbial environment that specifically eliminates pathogens [3]. Optimal dosages of probiotics provide several nutritional and physiological advantages such as improved growth performance, intestinal flora, immune response, and meat quality [4]. However, the rising preference for natural and safe alternatives due to their nonresidual effects and negative effect on the environment has increased the market for phytogenic products as potential alternatives [5]. Phytochemicals are biologically active compounds in plants that elicit physiological changes in farm animals. One of the most recently utilized phytogenic plants in poultry nutrition is _Moringa oleifera_.  
_Moringa oleifera_ seed powder contains biologically active compounds such as alkaloids, flavonoids, phenols, saponins, steroids, and tannins with antimicrobial, antioxidant, and hypocholesterolem effects [6]. Furthermore, the seed powder is a rich source of crude protein, essential amino acids, dietary fibre, fatty acids, minerals, and vitamins [7], which are essential in maintaining and improving carcass yield, meat quality, gut health, and tibial integrity in broiler chickens. However, high levels of fibre (5.03 mg/g) and condensed tannins (241.67 mg/g) [8] in the seed powder limit its utilization by poultry, especially when included at higher dietary levels [9].  
Alternatively, the extraction of water-soluble nutrients and bioactive compounds from moringa seeds could be a strategy to reduce the antinutritional effects of dietary fibre and water-insoluble condensed tannins while allowing the birds full access to moringa's beneficial bioactive compounds. Water extraction of phytogenic compounds is one affordable strategy that does not require expensive or specialized equipment and can appeal to resource-constrained farmers. However, no studies have attempted to evaluate the effect of administering _Moringa oleifera_ seed extract (MSE) via drinking water in broiler chickens. This study, therefore, investigated the effect of different doses of MSE on carcass characteristics, meat quality, intestinal morphology, goblet cell count (GCC), tibia morphometric parameters, and tibia mineral content in Cobb 500 broilers. It was hypothesized that oral administration of MSE via drinking water would improve carcass characteristics, intestinal morphology, and meat and bone quality parameters of the birds.