I guess I broke all the rules about roosts. I had owned cockatiels prior to owning chickens. I had read that it was better to use a branch for a perch than the dowels, because standing on the same diameter perch all the time was not good for their feet, and the variety of diameters offered by using a branch allowed them to flex their feet more. I used this same line of thinking when I built my roosts. Yes, I know chickens are not cockatiels, but I've seen chickens fly up into low branches of trees to roost when free ranged. Fortunately there are quite a few very large oak trees on the property, and after a good wind, there are sometimes some good sized limbs that fall. When this would happen, I got a saw, and cut the nicer sized limbs into useable lengths, then set them aside until needed. When I built the roosts, I had them at 18 inches tall, however, I recently raised them just a little when I put in the grow-out pen. (They jump on the grow-out pen, which is 33 inches tall, and down to the ground) I have sand flooring in my coop, so it's a fairly soft landing. They seem to like the arrangement, and so do I. I've never had any new foot issues with them, so far.