One of my female runners legs became paralyzed. All she could do is float in the pond. She couldn't paddle around. Today, one of the legs is able to paddle. Our mini farm is fenced with a brick wall. Sometimes feral cats and other critters make their way in but she doesn't show signs of having been attacked. The ducks rarely venture too far away from the pond. Because she was found floating in the pond, I can only assume it happened while in the pond because how else would she have made it back into the pond. The only thing in the pond is turtles and fish. Although we have seen a king snake on occasion. Has anyone ever heard of this before and do you have any ideas what could be causing this and what can we do to help the duck regain use of the other leg?