I have silkies and they are laying regularly now. However, I was petting one of the hens in the nest today, and felt a golfball size lump on her chest. It's kinda soft....it's also bald on her chest. The rest of her is fully feathered. Any ideas? Is this the crop? Also, I have one hen that seems fine in every way, other than she has gone bald in a mask like pattern around her face/head. None of the others have. WTF?? I am a new chicken mom for the most part.