We have a Red Star who has a growth at her hip. The majority of it seems to be "outside" her body. We found it after some dirt had been mashed into it. This afternoon we checked on her and the growth was open. The dirt is out but it looks and smells like some decay had occurred. A bit of bleeding too. She limps a bit but doesn't seem to be in pain. We're new to the backyard chicken realm. Any tips?