I have a chicken that spends most of her time puffed up. She always appears to be trying to go to sleep...regardless of the time of day. Also, I noticed that she has some type of lump or mass on the right side of her chest. It feels like she has a golf ball under her skin. She had a swollen eye earlier in the week but that is gone. She is eating ok and doesn't appear to have anything wrong w/her and in good spirits. Should I be concerned?