I've been nursing two ducks back to health after stray dogs broke into our coop. My ducks' wounds aren't as bad as yours, WatchTower, but they did have bad bite wounds to the upper breast and back. We flushed the wounds with saline (just once to clean the wounds), applied topical antibiotic daily, and mixed aureomycin and electrolytes/vitamins in their water. It took three days before they'd eat anything.Early on, we kept them very warm; since they weren't eating we didn'T want them to use Their limited energy to stay warm (good advice from Amiga). We've known that if they took a turn for The worse that we'D need to do the right thing, but It's been three weeks and they are getting stronger and better. They eat, drink, play, quack and swim (in warm water daily). The wounds are looking good and healing. With these bad wounds, keeping away infection can be hard. Our ducks now live full-time in our downstairs bathtub. It is easy to clean (twice daily), it drains well, and I can fill it up easily for bath time. Ours is a cast iron tub, which means that we can use super-strong magnets to hold their water bowl in place (otherwise they'd quickly run out of water!). We put down clean towels in the tub after cleaning so they have something warm and dry to sleep on. I think it helps a little for The two survivors to be together. It will be another couple of weeks before their wounds are healed enough for them to live outside again. We are really looking forward to having our bathroom back! Good luck with your duck.