I have never seen deer eating it. Hogs root it up constantly and eat the roots (I guess), maybe they’re going for grubs. There’s no way I’d have it in my yard, after any moisture it grows those weed heads to a foot high in a few days. It dulls the hell out of mower blades too. Maybe we ain’t talking about the same grass. I kill it wherever i can on my place. Easy to kill with Cimarron, you just have to be diligent and persistent.