My husband and I got home from town today to find 4 of our 5 ducks dead and one missing. We figured out a neighbor dog had come on our property and killed them. While hunting down the dogs my husband found our missing duck hiding under the bushes- alive but he has a huge hole in his back, kind of under his wing. It is about 1 inch deep and the size of my fist. We have no idea how to take care of it or treat it. Is there anything we need to look for to be able to tell if it is even something that he can be saved from? How do we being to treat it? We locked him in with the chickens tonight.