Introduction: Meat is a major food commonly consumed by humans. Meat quality is important to the buyer purchasing meat and is a particularly crucial level for the meat industry of this century. In many countries, due to the rapid increase in customer demand for high-quality meat, the meat industry must produce convenient quality meat that offers safety, tenderness, health and flavor to ensure an increase increased meat consumption (Joo, 2013). Animal welfare is well-being, good health or fortune, happiness and comfort. Animal welfare experience provides the best information on other aspects such as life extension, behavior, physiology, genetics and reproduction (Ewbank, 1999). Previous slaughterhouse factors affecting meat quality: The final stage of systematic livestock production is the transportation and slaughter of local animals produced from the best quality meat. However, throughout the period before slaughter, different types of stress are manifested in local animals, these stresses being caused by humans, different environmental situations, travel, hunger and thirst. In addition, in the duration of housing, many factors can influence the recapture rate of animals, such as housing time, absence of starvation, lack of water and ecological status. However, housing stress increases in farm animals due to dehydration of food and lack of water. Some blood components are changed in the animal's body during the breeding period due to these stresses, such as lactate dehydrogenase, glucose and phosphocreatine kinase (Ekiz, 2012). Stress is a non-specific emotion that occurs during external tests such as severe physiological and environmental physics. It is middle of paper that magnesium (MgO) supplementation has been shown to be a viable way to improve meat. Muscle glycogen was retained more by MgO in marine lambs during the latency period until slaughter. On the other hand, lambs were given a magnesium bolus in a feedlot approximately 28 days before slaughter (Ferguson, 2008). Conclusion To summarize, a large number of animals are used by humans. They are animals consumed for many purposes to spend pleasant time and produce eggs, meat, leather, wool and hair. The livestock sector, moreover, constitutes the main part of structural agriculture in global or industrialized countries which currently provide an enormous size and concentrate of particular infrastructure for meat in the world. The term animal welfare model has distinct meanings in this issue: it is about treating the endurance and stress of susceptible animals..