Last night I noticed he was puffed up, but they all were, it was colder last night (low 50's) than it has been since I moved them from brooder to coop a few days ago. So today he's still really puffed up, not moving around much, lethargic, not eating or drinking. Crop full and spongy...and I don't think he's eaten so could it be a crop problem? Vent fine. Taking a bit of water with lytes/probiotics, refusing scrambled egg. Have noticed gaping a few times, no sneezing or other noted resp. symptoms. I've had him in the house for about an hour and no poo yet. Any thoughts/suggestions? Thanks!