My Dominique seems to have a tumor on one side of her back. It doesn't seem to impede her in any way or bother her. She doesn't mind if you pet the area either. All of her feathers are intact. I suppose it could be a deformity except that it seems to be getting larger. She is still laying and the other hens aren't bothering it. My question is: should I euthanise her now or wait until it is having an effect on her life? Thanks for your opinions.