I have a Duck that survived an attack (raccoon or weasel) that the flies found before I did. I cleaned the wounds and put vetericyn on them. One wound is deeper than the rest and yesterday (about 24 hours later) I found maggots in the wound. I poured hydrogen peroxide on it, then cornstarch and then more peroxide. I rinsed her and put her back in her hospital bin in my house. Well, today I checked and she still has maggots in that wound. Should I continue the same treatment or is there a better/easier way to kill the maggots without harming the duck?