I looked back at original post. I don't think I have been in 110+ heat index and don't want to, so I don't claim to know anything about cattle nutrition in that environment.Protein will only make them hotter. They don't eat well or gain well when its this hot. Mine are provided good pasture and that is it. I'll take what I can get off that. Mine are fed once a week of the cheapest stuff I buy just so I can look them over good and spray them.