I think neosporin and wrapping together can cause that, but I had a vet advise me to leave chicken wounds open and apply a topical antibiotic. I'm sure there are other opinions about it, but I've never had a problem with it.
I had a young pekin duck that was attacked by a dog. She had an injury around her spine and leg and was unable to walk at all for over a month, but now she is a perfectly normal, chubby girl who lays me an egg almost every day! We did get a little help from the vet (a steroid shot) but he said...