I have a 7 month old light brown leghorn that is limping. She has a hard callus on the bottom of one foot, she doesn't react as if it causes pain if I press on it. It is not red or swollen. Can chickens get calluses? I've checked her leg thoroughly and haven't found anything out of place, no cuts or scrapes. She dosen't seem to be in pain when I move her leg through the full range of motion. Does this look like the begining of bumble foot? She's in a run with 12 other hens and 1 rooster.