The objective of this study was to investigate the effect of seasonal thermal stress on serum hormones, oxidative status, and immune response of periparturient dairy cows. A total of 32 healthy Holstein dairy cows in the perinatal period with the…
This study was conducted to investigate the effect of heat stress on the physiology of dairy cows and to detect the relationship between rectal temperature (RT) and respiration rate (RR), heart rate (HR), and plasma concentrations of cortisol, thyroxine, and…
Heat stress, as a consequence of global warming, can have a profound effect on dairy cattle in South Africa. In this paper, current milk production data of Holstein dairy herds on pasture in South Africa, together with climate variables related…
