You don't mention how many ducks you want to get (very important as your setup looks VERY small) or if this is only their nighttime coop/pen. Its absolutely adorable, but I wouldn't recommend it unless you can greatly expand the area.
The ramp isn't appropriate for ducks, they need a solid one - which has already been mentioned. A small pond or bin for swimming is a must, as well.
The ramp isn't appropriate for ducks, they need a solid one - which has already been mentioned. A small pond or bin for swimming is a must, as well.