For 7 and 1/2 years, I've had the same chickens. Well......7 of the 17 are still around. I've had a ladder roost.....about 8' long and 4 and 1/2' tall, with several horizontal 2x4's leading up to the highest roost. The girls love it because the top roost lets them look out of the window, and also roost on the window sill. They love it in good weather. But......they are getting old and I think they are getting hurt getting up and down. I need to lower it all quite a bit. Will this confuse/depress them, if they can't get up to the window? Would it be okay to just put a couple cement blocks on each end, on the floor, with a board on top of it? Should it be a 2x4 piece of wood, or something wider so they can actually rest their entire bodies on it (like a 2x6 board)? I want them to be happy in their old age....but I don't want them to die by falling off the taller roost. Thanks for your suggestions!