Comparing hair cortisol concentrations from various body sites and serum cortisol in Holstein lactating cows and heifers during thermal comfort zone

Measuring cortisol in hair has recently been established as a reliable physiological index to evaluate chronic stress conditions in humans and many animal species. The aim of this study was to determine serum cortisol and the concentrations of hair cortisol from various body sites of lactating Holstein cows and heifers during thermal comfort zone. Forty-seven […]