When I bought this chick a couple of weeks ago, I later noticed it had a little bald spot on his lower left side of his neck/upper left side of chest. It has since puffed up to this bulge. It's not hard. It feels like its a bubble. Anyone know what may be the cause and how to treat it?
I think that is where they give chicks their vaccinations, and it could be a reaction from that. I've had a chick that wasn't vaccinated that also had air bubbles/water bubbles under its skin (this one ended up dying, however).
Could it just be the crop? (that is on the right side, though, just thought I'd check).