Thank you for all of the advice.
Why is it that even when the coop did not have the nesting box they still refused the roost? Could it be that they are square pegs and not round and they don't like that on their feet?
I will try all of these suggestions and make the adjustments this weekend.
Unfortunately we cannot free range the chickens as we have a hawk sitting and watching them as well as a dog who can't wait to take a bite. When I read about the amount of space needed for each chicken I assumed that was total and thus included the run. I will be extending the run as soon as possible and it will also be on the dirt so they can dig a little as I have started to have some behavioral problems as well.
Thanks!
You're welcome. I don't think the shape of the roosting bars had anything to do with it. Most of the roosting bars I've seen have just been 2 X 4s, and the chickens readily use them. I think the reasons they didn't use them are either that they do not have enough space between the roosting bars, or there is not enough space between the roosting bars and the wall, or the roosting bars are not high enough, or likely a combination of all those reasons. If you extend your run onto the dirt, make put a hardware cloth skirt on the outside of the perimeter covered over by some dirt or rock to prevent digging predators from getting into your run. Good luck in making your roosting bar and run adjustments.