We live in the middle of a wheat pasture and the wheat is really doing well, thick and green, and about 4-6" tall so far. My chickens seem to spend over half their day out there in the wheat eating like crazy, and they are getting quite the finish on them. Deep creases down the center of their breasts and filling out a lot. This surely can't hurt them, right? Would there ever be a point to where I need to put them up to keep them off of it?