We have a separate coop/run for the old ones. They deserve to not be bothered by the Roos. They don't roost, but they do go up in a dog house at night.
Just like my Old Hens' Retirement Home & Hospice. When their hock joints become arthritic, they sure don't need to be jumped by some overzealous rooster ten times a day. Now, though I have so many old hens, they are in two different pens in the barn. I have more oldsters than youngsters!