We just picked up our first ducks from tsc. Three cute Peken ducklings. Today as I was placing one in a utility sink for a swim it made a jump from my hand and caught the edge of the sink then ran off the edge and dropped to the ground. She seemed to be ok. She swam a bit but when I put her back on the wood chips she seemed to not put weight on her right leg. She seems to still not want to put weight on it much tonight. At first she did not want to expand her foot but this evening she is expanding it. She does not drag it. She always keeps to under her body. She often walks around using the wall of her container as a crutch. She appears to have full range of motion of it and will push off of my hand of I pick her up and place my hand under her. She seems to keep it angled inward though under her. She simply appears to not be able to put weight on it. What should I do?