My 4 yr old rooster is moulting, and I just noticed that he's got some red patches. The crop area is hard, non-movable, and a bit warm. It won't move at all. The swelling sort of wraps up around his neck. This erupted some time between 4 pm last night and this morning. Any ideas? Thank for any advice. Right now he's in a pen by himself, which probably causes him a bit of stress. And, edited to add, there is no smell from him at all.