I was just out checking my ducks there now and I saw my drake lying down and he wouldnt get up. He's completly g me apart from his right leg. It's either buying him or he can't feel it. I put him the pool and he occasionally paddles with this leg. I didn't do anything harsh just gently bending the leg and then I made a pop noise. He's still limping with it though not showing any pain I think. He was perfectly fine all day until I seen this happening. What could be wrong? And what will I do many thanks!!