One of your pekin ducks is limping badly. We brought him inside to check him out and noticed a large lump on top of one of his toes. It looks like there is a small scratch on the bottom of his foot..applied antibiotic ointment there Pic of the swelling, which is warm to the touch: He is inside in the pet cage for the night (and probably a few days so he can rest the foot. Ideas? Advice?