Since everything is pretty dead and frozen, there's not much for the chickens to entertain themselves with and scratch around in, especially when contained in their run. I have some of my horse hay that's questionable for the horses... well, they're just not going to eat it. It's out of a mixed grass field and several bales are heavy in Johnson grass stalks. The horses just won't touch this anyway, so I thought I'd take some of those bales and give them to the chickens to dig through and kick around. I could toss them a bale of last year Bermuda hay, too. That one particular batch has a lot of sage grass in it that the horses discard and have problems with the sage grass seeds. BUT, I believe I've read that giving them access to hay can lead to crop issues because they can suck down a long, tougher strand of hay that gets balled up and can cause an impaction... where when eating grasses, they rip and bite off pieces small enough to not cause any problems. They do have plenty of access to grit and sand/stones of various sizes in their run and when they free range. SO, is it a bad idea to give them some hay bales to dig through and play with, which they'll surely attempt to eat on, too? I know they'll try to pick at it and eat it, but I was mostly thinking of giving it to them for entertainment purposes-- give them something more to dig and scratch through!