I normally buy 2 and 3 weights around Sept. and Oct. and sell them the following year, before Labor Day. I have had a few problems with Ringworm and this year, Warts. One question a vet asked was if I was feeding a mineral. I keep a 50 lb. block of trace mineral salt for my calves, but he said that I needed to feed a loose mineral. I have talked to several people and they recomended a mineral with CTC in it. Does anyone have any recomendations?