I have two ducks, one male and the other is female. The male seems to be doing fine however I am worried for the female. A few weeks ago I noticed that the female had a patch of feathers missing. This worried me because the ducks live in the same pen that we keep our pig and our goat in. However I assumed that maybe she was just getting her adult feathers in. Now though not only is she missing more feathers but last week she had also been bleeding in the bare area. This is what her back looks like now. I also noticed that she has been limping however when I had picked her up to look at her foot I had to let her go almost instantly because of how hot her body had felt. But I did get to see that her knees were bleeding and that she was starting to lose feathers from her stomach as well. Please help me, what do you think is wrong?