I saw the place @mariarose said sells a pound of it but they are mail order. Does anyone have an alternate place to buy it in small amounts? Or is there a decent sub for it? I have a buck that looks like he could use it. He might would do a chew... we give a few treats as we go in to feed. But that is iffy with D. I did find a sheep mineral with it added. Kalmbach 2:1. Here are the specs. Would it be enough to top dress the food ya think?