So thick bedding is even more important. If you stand on concrete for any length of time, you know how tiring that is to your feet and legs. Now do it all day long, barefoot. That's what chickens do.
If you have access to wood chips, that makes a great base for bedding in the run. They last a...
The thick bedding will also be much kinder to their feet. It'll provide a softer landing when they jump off the roost too.
You won't have any predators digging into your coop/run, that's for sure. :thumbsup