I used a 5x7 foot Dog Kennel with a Chain Link Roof. Underneath is hardware cloth over 1 inch of gravel with a 3/4 inch rubber mat on top of that gravel, this makes it super easy to clean.
Hardware cloth you can see up 24" and the Dog House where the Ducks sleep is on the outside of the pen with an opening cut out so the ducks can enter the house. The house is anchored to the ground, and also screwed to the chain link fence.
Hardware cloth you can see up 24" and the Dog House where the Ducks sleep is on the outside of the pen with an opening cut out so the ducks can enter the house. The house is anchored to the ground, and also screwed to the chain link fence.

