My hen has had a band on her leg since I purchased her. Although I could tell it was too tight, she has always been fine and very hard to catch. I happened to catch her this weekend so I took off the band and it was obvious that the leg had grown around it in a way.... no visible signs of any injury scratch or cut. nothing. She was fine until two days later she cannot walk on that leg. There is a black looking growth thing in the area and she won't put weight on it, but is eating and hops around. Any experience with this?