We just got back from a few days away from home to realize that our chicken sitter did not let the birds out of their coop this morning. It's mid 80s here and the coop is made of metal so a few of the girls had their mouths open by the time we discovered it. We live in town so we don't have a lot of critters but I'm sure we could get some. Now I'm nervous for the next time we go out of town and I'm wondering how critical it is to lock the girls in at night. They have a run made of 1/2 inch metal fencing but it only goes to ground level and we have nothing buried. The coop, I'm pretty sure, is super safe. I am going to find a new chicken sitter but during the summer I'm almost more worried about them not getting out of the coop. I'm wondering if I'm crazy to just consider leaving the coop door open full time. We also have a 4 foot fence around our yard, wood in the front and back and chainlink on the sides. I have never seen a snake or rat but we did trap a possum last year and we get the occasional stray cat if we don't close the yard gate.