I've noticed my hay is loaded with what I call spear grass. It's about 4" long, has a small barbed head and a corkscrew tail. I've had a problem with this in my pasture but not in my hay meadow until now. I've removed this "spear grass" from my dogs and noticed once they come in contact with it, it burrows deep under the skin. My question is, can my cattle tolerate hay bales infested with it?