This is my 13 month old labs first year hunting. Hes done great the times that we have hunted him as far as getting the ducks and bringing it back to the blind. Since the blind is a floating blind he never has to hold the duck out of the water very long at all. But I've been working with him at home at the pond and he has started something that I don't like. Hes been swimming out and getting the duck just fine but when he gets back to land he dosent want to hold the duck in his mouth long and starts chomping on it. Is there anything I can do to break this habit?