 any changes in their stool, anything that's abnormal to you may be worth exploring because it may be the signs of one of those diseases that takes a little while to manifest itself. If you keep them away from the other horses, it prevents a big, big problem for your barn. It's kind of a pain in the butt, but it can prevent a lot of issues. If you board the horse in someone else's barn, there's a question you should be asking. Is there a biosecurity plan and agreement? When you come and go, is there something that you need to follow?