I use pine shavings plus a little
Coop Freshener in the coop. The current run and pens are just dirt, I don't add anything to it.
When I build a new coop they're just going to roost right over the ground. It's usually so dry the poop dries out and the chickens scratch it into the dirt so there's not much to pick up.
I pick up whatever I find with a
slatted litter box scoop and a rake from a
dog pooper scooper set. It's fast and easy. I just fling it over the wall (there's no one next to us on that side, it's just open desert).
I've heard about problems with straw getting stuck in their crops so I've stayed away from it.