Hello, I have 6 week old ducklings. One of them is not walking on its flippers, it is on the bottom of its leg.....flipper and part of leg to knee. I think it got injured the other day when they all moved to one side and it was flipped on its back and under the other ducklings. I would prefer not to put it down. It does get around kinda flopping on its legs.... and is eating and drinking, but is smaller than the rest. Any ideas?