The anti–heat stress effects of Chinese herbal medicine prescriptions and rumen‐protected γ‐aminobutyric acid on growth performance, apparent nutrient digestibility, and health status in beef cattle

This study aims to evaluate the anti–heat stress effect of Chinese herbal medicine (CHM) prescription, rumen‐protected γ‐aminobutyric acid (RP‐GABA), and CHM plus RP‐GABA co‐medication on growth performance, apparent digestibility, and serum parameters in heat‐stressed beef cattle. Forty beef cattle were randomly divided into four groups. Control group was supplied with basal diet, while CHM, γ‐aminobutyric acid (GABA), and CHM + GABA groups were, respectively, supplied with CHM, RP‐GABA, and CHM plus RP‐GABA in basal diet. Our result indicated that CHM + GABA elevated apparent digestibility including crude protein, Ca, P, crude fat (CF) (p