My Hens have taken to roosting on the roof of the coop ( outside ) at night. Since my run is completely predator proof and it's been extremely hot, I let them. They are coming up on 20 weeks and my husband is worried that their first eggs will roll off and break. I may have to bolt down roosting perches inside because they do move a tiny bit and, it may be why the Ladies don't like them ??? My other question is, should I have " freestanding perches " inside the run ?