I'm about to remodel my roosts. Somebody posted awhile back that she had hinged roosts attached to the ceiling that she can lift up, out of the way. This sounds like a fine idea to me, and I'm going to try it out. It would make cleaning the coop so much easier!
Edselpdx, thank you for sharing about your results with the lino! Now I gotta find some! My plank floor is a real PITA to clean, and has gaps between boards, so deep litter doesn't even work, the small bits fall through.
JJconcepts, we have hawks here, I see them all the time, but they haven't bothered my chickens. Maybe because they're not the really big hawks. But a guy I know told me he makes a thing he calls a "scoot 'n hide". It's just a piece of roofing tin, plywood, or whatever, with the corners up on cinder blocks, and weighted down so it won't blow off. The idea is to give the birds a low cover to run under if they spot an aerial predator. They're good at keeping watch and sounding alarms. They have different vocalizations for different kinds of predators, too. The "ground predator" noise is very different from the "aerial predator' noise.
Old satellite dishes work, too, (the bigger ones) just put them face down on the ground. Most have a curve on each side, that makes a hole the birds can run through. But if not, you can set it up on blocks.