I wouldn't risk it, personally. Of course ducks love water and will always choose it, but being a creek and not a pond, the chances of them getting too far away is a huge risk. Not to mention predator loss.I'm debating if I should allow them to keep doing that? If I choose not to I'll just run a piece of chicken wire along the base of the fence to keep them from squeezing through the holes. It would be cool to have a massive flock of free range ducks and I'm sure they love that creek. Do ducks usually stick around the coop or do they tend to wander off or swim down the creek never to be seen again?