I have a Bourbon Red tom that hatched with three wings. He had the two normal wings and a third on his breast. I thought the extra would eventually fall off or be pulled off, but it is still very much there (he's about eight months old). It has a blood supply, it isn't just feathers. About a month ago he started sprouting a fourth wing, this time mid-way between his regular wing and his neck. It also looks like it has a blood supply, it has a pink fleshy part. Will he stop growing new wings? It's getting a little creepy.