Ok so I got this chicken about a month ago and noticed she had a hard scabby lump on her neck/ chest area. She does not act like it affects her eating or drinking she is not laying of course from molting and not sure how old she is anyway. But she runs around fine with the other chickens and acts normal my question is what is this and will it affect her laying or the other chickens. The lump is hard it does not move around so any guesses?