One of my dogs yes my dogs killed one drake and attacked another. The duck escaped by wedging himself in between a pen and a retaining wall. A space of only 6 inches maybe, I had to cut the wire to remove the duck. Now despite total lack of obviousness injury one leg is not working. All joints, tendons and bones appear fine. Also his bill is banged up. I will be bring him in to see if he can swim in the rub. Any thought on what to look for as to the leg, and is there anything I need to do for his bill?