Hello, I'm thinking about adding sod to my 1600 sq feet run. The sod will be in place for several weeks before the 12 chicks are old enough to enjoy the outdoors. Also, the run is constructed in a way that will make it easy to section off grassy areas that need a break from chickens. I know that chickens tend to de-vegetate everything, but I was wondering how quickly they would decimate the grass? Is this a terrible idea even if I can manage wear and tear?