We fed Calf Manna -- 2 oz 2x per day top dress for years, realy puts the bloom on and with a good ration to go with it, we grew hair in Mo in July!! Sure worked for us when we were out there! Good stuff, milk replacer is in there too by the way!
I think they've changed calf manna, at least around here. Everything I can find takes half a pound or more to get any results. We have used milk replacer to good results though