One of my Male Peking ducks is not swimming and remains on the shore while all the other ducks are swimming. It seems to walk fine and does not appear to have any wounds that I can see. When I walk up and try to catch it, it jumps into the water and tries to swim. When it swims it seems really front end heavy and tilted to the left. It is almost like his butt is popping out of the water more that it should be.