Ducklings Becoming Ducks

My not long ago ducklings are well on their way to becoming fully grown ducks. They are all growing real feathers, learning to quack, etc.

When I had my storage building built I had it put in 3' from the back fence so I could walk behind it (which I seldom do). When I extended the duck yard making it into an "L" shape I stayed 4' from the storage building so I could walk through (which I seldom do). In the next few days I'm fixing to use some 1" x 6"  w/ 4" x 4" backing blocks to close off the gap between the floor of the shed and the ground. Then I'll plant stakes in front of the 1" x 6"s. The main reason behind this effort is to restrain my murderous dachshund, Bella from getting to the Quack Pack. I'll use an arbor bit to drill some holes in the 1"  x 6" to allow air flow to minimize chance of mold, mildew, fungi and rot in the shed's floor.
After that is done I can cut a gap to let the young girls in with the adult (laying) girls and close that fence gap. Then I can cut the fence in a couple of places and open up the aforementioned 4' beside the shed and 3' behind to them. 4' x 15' = 60 square feet plus 3' x 14' = 42 for a grand total of 102 extra square feet of duck & goose paradise. I'll keep expanding so in time I can rotate their enclosures to seed a section and allow it recovery time while they eat every green growing thing in another.