Ya there run is open and covered to protect from flying predictors when they arrive. And free range all day. I mainly thought about like 8 or 9. I have 5 hen boxes but room for 3 more and I've added 2 more roosts. There seems like plenty of room for a few more.
I have a 4 x 6 coop with a 10 x 10 run and free ranch when I'm home. I want to add more. All hens so with that how many more can be added while keeping them happy?