Mine were in the other half of the coop, 40 in a 10x10 area. I kept them (and me) happy with their containment and poo by putting about an inch of fresh shavings down each day or so. Halfway through their grow time, I "stripped" the bedding all out, and started fresh. They stayed pretty clean, and the odor was low. They liked to try and "dust bathe" when I would put the new shavings down, so they seemed to be happy with their chickeny selves. I liked that while they didn't have the nicest feathers, they weren't too filthy when processing time came. They were used to me throwing shavings around since they were little, and just milled around me until I was done.
All the soiled bedding goes in my garden, either to be spread out for all of winter, or if it's spring/summer, it's piled and composted to be spread out.