My horse has a salt block & a red mineral block... he almost ALWAYS has the mineral block gone before the salt block. Before I gave him the mineral block though, he was almost always licking a metal fence.... afterwards... well, I haven't seen him lick a fence again!! It just took the simple addition of a mineral block!!! Plus.... his coat always was nice looking... but NOW... it is SOO gorgeous!!! I've never seen it this pretty!!!!!