Neighbor was just down here wanting to borrow my sprayer to spray 2-4-D on his pasture. he has a few horses on around 7 acres which he reseeded, OR I DID, this spring and they have kept clipped pretty close since, giving the weeds a start. In the course of conversation, he said that horses can eat moldy hay without it effecting them, OR AT LEAST KILLING THEM. I said I thought that it would/could kill them, and if not, they had a name for what horses got if they ate moldy hay. Whos right?