A bubble appeared on my chick's upper back and 24 hrs later it is spreading to the neck and head area. You can actually see through the bubbled skin. Has any other person ever experienced this? If so, what is this and what do I do to remedy? This chick is a youngster and appears to not quite have developed as quickly as all the others. He has experienced paralasys of the legs, but after being isolated and fed made a complete recovery. He's a spitfire. but I am worried that he may not bounce back from this. He's very friendly to me only. should I pop the skin or just leave it alone? Any help or advice would be greatly appreciated.