Pony ate the astroturf off one of the jumps where I board. What gets me is not that he tried it, but that after he took one bite he KEPT GOING. So, yeah...I agree with the idea of letting horses have more than hay and grass. I intentionally leave trees and shrubs within fenced-in areas now, so they can do that. I am always suprised at what they'll eat when given the chance. That said, Rusty also eats our jump poles if we leave them out and he's bored so...