Peroxide can help tissue in very low concentrations according to some studies ( http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0049215,) but in concentrations most use, it will impede healing. It shouldn't be used more than once, then diluted, but is helpful in debriding dead tissue. Bactine contains a pain killer that may be toxic to chickens (lidocaine,) and should be avoided. Normal Saline is about as safe as you can get for wound care, and a weak betadine solution may help. Betadine, along with Neosporin, and other things can be toxic in large doses for long periods.