One of my hand raised pigeon youngsters who is about two and a half months old suddenly can't walk. Her feet are purplish blue and swollen and she can't seem to move them. The weather has been very mild lately so its not frost bite. I have cleaned the feet/legs and there is no string or anything cutting off the circulation. She is still eating and drinking normally and I have her separated her from my other birds. she showed no symptoms (that i noticed) before this morning. Any one seen this before? Any suggestions? I'm very worried about her..