@Kev , here are some pictures. They all roost on the upper-most two perches (above where Snape is crowing). I'm thinking that perhaps I'll hang shade cloth over the hardware cloth by the perches - I have used it at the roost end of the tractors, and it allows ventilation while cutting big gusts and blocking entry of the sideways rain we seem to get a lot here.
- Ant Farm
I agree, very nice set up and looks very sheltered, would not worry about them sleeping out.
If it were me and really wanted them in the fort, would have removed the lower perches and hope they either cannot or don't try to fly straight up to the highest perch. It will be tricky to put wire/something across the top of the perches,, did not realize they were corner supports.
It might be they are also so comfortable with sleeping high off the ground, if the perches inside the fort are close to the floor(Tank's setup), this will make them uncomfortable- feels too close to the ground and not "safe". My tree sleepers were not comfortable with perches "just" at 4 feet high, much worse if it happened to be a pen with a single perch at 3' high. They would hop up and frantically look around for something higher until it was too dark for them to see any more. In the pens where they could do a bit of flying(5 feet straight up), they were more comfortable from the start. If the perches are close to the floor in the fort, maybe try a couple higher up, where they really had to fly up at least a couple feet, no stepladdering? But I never had a coop so I have zero ideas about ventilation or other concerns, especially if frostbite is a possibility?(never is here)
btw now that the chickens dont get to free range anymore.. the ones that grew up with low perches have been completely fine with it. even just at 3' high off the ground. Jump up, sit down and settle straightaway.