My 3 month old mallard got his leg caught in his pen. He freaked out when it got caught innitially and I am afraid he injured it worse. He holds it up but can put pressure on it somewhat. Mainly when he flaps his wings. It looks a little discolored and I am worried about a serious fracture. He swims but doesn't really use it a whole bunch while swimming. PLEASE HELP!!! I'm very worried about the little guy. His name is Simon.