I'm not very familiar with Silkies, but I have read that they sometimes roost if given a not-too-steep ramp to walk up.
I had a floor-sleeping Brahma -- too heavy to fly up to the roost in their old coop -- who had to be taught to walk up to the roost. I'd pick her up out of her floor nest and...
To clarify,
In order to keep them from, once integrated, all roosting together in the same space, you would have to have two separated facilities. Therefore, you have to provide enough space in one area for the entire flock.
Once integrated properly, the bantams and the standards will act as...
There is no realistic way to keep them as separate flocks with separate roosting areas within the same facility. You'd have to keep them separated by wire all the time, in the run as well as the coop.
If each large fowl bird needs 4 square feet of coop and each bantam needs 2 square feet of...