I am planning one getting two female Blue Swedish ducklings in about a month, so I need to figure out how they like their nesting boxes. My coop is about maybe 4ft wide by 6ft long and off the ground about 2ft I have 6 nesting boxes for my 10 hens, but I know the ducks cant reach them and they are way too small for the ducks. So what i am planning on doing is covering the coop floor with plywood, and then in the corner adding two larger nesting boxes to fit to the ducks. what dimension did you use? thank you!!