Hmmmm... I've been wondering about that for a lil wile now. But, I've been told that geese are much more aggressive than ducks, so i don't know.this may not be the answer you're looking for, but I was amazed how tidy my 3 goslings were, and have continued to be as adults. They DRINK their water, not strew it around like confetti. Downright civilized, those geese!