We kept a duck for the first two months and then took her to a local pond. Now, 2 months later, I went to see her and she has an injured left leg that she doesn't use at all, just drags it along and her back looks mangled. No feathers around oil gland and most are missing up her spine. She was hiding in a bush at the park and flies andants were all over her. Bright her home, gave her clean water and food and a bath, and she seems to be in better spirits now but still not much energy and obviously can't walk. She scootS around the cage when she needs to but doesn't go more than 5 feet. In the bath she flapped her wings like normal to dry off, but never dunked her head repeatedly like usual. Thoughts on what happened to her back? And is that what's causing the leg injury?