I have 6 beautiful chickens, and my two Delawares seem to be unable to hop up onto the roost or nesting areas of their newly built coop. It is not that high up, the rest of my chickens do it. Plus they have jumped up there before, and I have watched them attempt, fail, and then sleep on the bottom mesh. One of them, Pinto seems like she is about to jump and then she gives up, then she does it again. She may try to actually jump, but if she fails (99% of the time) she stops trying. The other girl, Pepper does not even try, she just sleeps on the bottom. So is it the chickens or is it the coop? Thanks!