OK, so I have new baby chicks and one wont use one leg. I don't think that there is any way that it could have broken its leg. I am thinking that it's feet are hurt from the shavings that i have in their cage. I am using fine flake shavings the feed store told me to use those so that the chicks don't get cut. I have raised chicks before and this has never happened. The only thing else I have in their cage is a feed and water. The chick will just hop around one one leg and it shakes. There are only seven chicks in the cage with it and it is the smallest.