I have a few that prefer to dig out their own dust baths and/or cooler dips in the sand, right up against the run wall. On really hot days, they dig deeper and deeper and have dug holes large enough to escape. I have some roosters that free range whenever the girls are penned up and oftentimes I find them digging on the other side of the fence as the girls. This makes a deep hole happen quickly. That's my fault as I need to predator proof and this won't happen.