Well, one or more of the horses (not sure how many as I wasn't there) stuck their head through the bars of my feed pen. They wound up putting there lips around my goat mineral and pulling it of the pen and eating it. There was only about 1/4 the bag of the Manna Pro minerals left in the bag when they got ahold of it, so I know they didn't get much. My question is, can this make them sick? Is there anything I should watch out for? I am not sure if they stole the minerals this morning or this evening. However, they seem to be acting fine. Nowhere on the bag did I see not to feed it to horses. I just worry. Thanks!