Today when I checked out my ducks I noticed that they have entered into my parrot cage. Imagine 5 ducks in a parrot cage. I helped them out, but there was a huge problem with one of them. A leg of his was stuck between the cage and he was trying to release his feet for a few hours. I felt that he is going to die of fatigue. I tried my best to release his feet. Then I noticed that his feet has become a bit dark and noticed signs of contusion. He is limping now but eating and drinking normally. Can it heal on its own?