Quote Originally Posted by buttercup132
No, it was caused by some type of black shavings that is poisonus to humans and horses. Some of it got into our shavings and we had to evacuate the whole barn and give them all shots. That horse eventually died and I think a couple others did too. But since they don't use shavings it wouldn't be that.

Buttercup, I think you're talking about black walnut tree shavings, yes it is very poisonous to horses.

Sorry horse lover, I forgot to mention maybe the teeth needed floating. Whoever thought of it, thanks, just don't remember who it was now.
But if that horse isn't dumping it sounds intestinal.