I hope I'm not asking something that's already been talked about a lot. My question isn't, "can I keep grass with chickens," but how big an area of grass it takes per chicken for them to not be able to devastate it. Obviously, after three or four years of chicken keeping, I am well acquainted with the notion that chickens will tear the grass right up from the roots. But they can't tear up all the grass in the world! How many of square foot should a person allot per chicken to avoid them tearing it all up? Obviously, this also depends on where you live, so I'm looking for an average. Specifically, if I move to Austin, that is where I'd be applying any rule of thumb Thanks!