Eww! Washing chicken poop out of astroturf sounds like a nightmare!
I'd suggest two pens, alternate them and plant a fast growing cover crop in the other. That + free ranging should help. I still think any yard you confine chickens to is gonna be a bare dirt patch in no time!
our yard is too full of dangerous animals for them to free range in.
i wish they could, but it's better safe than sorry...i think we're going with the tractor. we'll just have to move it once a day...right?? thanks guys! you're great!