My horse is at a boarding stable, and when I went to see her this morning, all the hay in her feeder was moldy. I know horses don't usually eat moldy hay, but there was also a big pile of diarrhea in her stall . She was acting normal in every other way. Should I be worried? Should I keep an eye on her for awhile...and for how long? I came home to shower...and I was going to go back out to check on her again. Please help!