It varies from person to person but I rinse my steers in the morning, comb them out, blow them out and spray in a mix of ProCharge, ProPolish, (products by Weaver) and vinegar, and lock them in a barn with fans all day then rinse again at night, blow, comb and then lock them OUT of the barn at night. The more you comb them the more it stimulates the hair to grow kinda like when people run their fingers through your hair and you get that stimulating tingle...same concept. I also feed my cattle "2cool" by Showrite which contains tasco, a natural ingredient used to lower internal body temperature. There are many other feed supplements to help grow and maintain hair on ur calf. Check out the Sullivan supply website for more supplements and daily hair care products. I hope this helps