My Buff Orphington hen developed a growth with no previous injury to the area. It started maybe a week or two ago and I continued to observe it to see if it would clear up. It only grew larger and appears to have a dark discharge dried to it. I sadly discovered that it seems to have spread to the other side of her face and a little on the roof of her mouth. She seems to be acting normally and is eating. I have'nt found anything online or in books that matches her symptoms. Does anyone know what it could be and how to treat it?? I feel extremely guilty for not seeking help sooner as this chicken means alot to me. please help!!!!