We use it! Our chicks are only two or three weeks old, but it has worked fine. We homeschool, so since it's the end of the year we had lots of papers to available for shredding. :)
That's what I figured. Let them enjoy life for a couple of months, and then eat them before they get miserable. Our chickens will be free ranging in the backyard and I'll throw out feed too, but I won't really be able to specifically limit their diet while also throwing out feed for the others.