I found a pigeon with a foot injury. There is a wire wrapped around his ankle, his foot is very swollen, he is missing a toe and he limps. I took him to the wildlife center. They said they couldn't do anything for him because the wire was too deep. Also, his foot had been broken. They predicted that he would lose his foot in the future but they couldn't help him. So I took him back to his flock and released him. I now feed him every day. He is flying. Looks clean. But he limps badly. I'm worried that he won't make it through winter if he loses his foot. Do I take him in or leave him be?