One of my ducks was attacked by a dog and was badly injured w/ a small patch of missing feathers/raw skin on the back of the neck and a deep puncture wound on it's chest. I cleaned and packed the puncture w/ calcium alginate dressing, provodine and antibiotic ointment. We've made it through two nights so far, but today I noticed his bill has turned a greenish color. He's drinking water & pooping (not eating). Any ideas or advice?