One of my young roosters I've noticed, has been sleeping a lot. He goes into the coop and just lies down, with his head under his wing. I picked him up a few minutes ago to check him out and see what was wrong and I found this! My flock did have fowl pox a few months ago, but it looked different than this. Is this fowl pox? It's pretty bad. Also, his mouth is really mucusy and kinda foul smelling. Could that be impacted/sour crop? How do you treat that? I put him in a dog kennel and came straight in for advice. What do I do?