Because I have meat pullets in my juvenile coop I have an extra large nestbox in there. It's a large (cocker spaniel) sized dog crate, wire, covered in opaque plastic to give the hens some privacy. All the rest of the nesboxes are large, covered kitty litter pans. I have to use this crate because the meat birds are not capable of stepping up and into the opening on the other boxes. Their crate has a lip at the entrance that's only about 2" high, so it's not a problem for them to get in it. I have never had a problem with the chickens kicking the hay out of the kitty litter boxes. I've used them in my adult coop for more than two years without a problem. The juveniles don't disturb the hay in their boxes either. I can't keep hay in the dog crate! The whole flock delights in kicking it all out onto the coop floor. Today I have to refill the crate with yet more hay because there's none left in it. Should I just give up on using hay in that nestbox and just load it down with pine shavings, or what?