So, I take care of my sister's chicks and ducklings over the weekend while she's at work. I brought the ducklings outside, as I do every day, and into the pond. As I was watching them, they were all playing in the pond and having fun, except one. He was starting to tilt sideways. So, I picked him up and brought him back inside to his brooder and under the light. He was almost acting like he was in shock at first, barely moving, just blinking. Now he's acting fine other than he can't get up. He's frantically moving one of his legs and barely moving the other. I think its leg must be broken, but he was acting fine before he went outside. Any advice?