Physiological and pyhsical responses of dairy cattle to heat stress

Herd management and nutrition strategies against increasing negative effects of global warming on farm animals have been the subject significant debates in recent years. The fact that changes environmental conditions are directly related to habitats inside barn can affect negatively. Although heat stress differ according species, especially high-yielding dairy cattle exposed stress, respond with various interactive mechanism such as physiological, biochemical, immunological, anatomical behavioral. Therefore, selection practices going for many years improve yield characteristics significantly increased. In this respect, increased load body due high productivity decreases their tolerance conditions. This situation adversely affects cows breeding value. Yield losses, varying some factors about be partially explained by decreasing feed intake a result series hormonal responses affecting appetite region. However, physiological requirements must defined order develop appropriate reduce or eliminate stress. review, variations biochemical behavioral mechanisms originating from care, her applied were discussed.