We've just done a year of deep litter method in my chicken run (over concrete with wisteria over top and privacy fence for shade) and it's been pretty decent. Better in drier weather, not great in this wetter summer. It's not that deep of a deep litter at this point, so now, I'm not sure weather I just need to keep piling on the pine shavings (rain or shine) or to start fresh. I'm not opposed to compost, I just want what's best. On another note I think I am going to start over in their little coop since it's dry but the ammonia is really kicking up! This has been a mild summer but we're finally getting a heat wave so I'm not sure if that's a ventilation problem or what.