A lot of this appeals to me, but I have a few fears that remain, even after reading a bunch of forum posts and a few good guides on the web. We've got about an acre and a half of lawn, which the hens would have free-roam of once they were properly "roosted." What I'm wondering is -- what can I "expect" in terms of damage? I'm not a lawn freak, there are large sections of my lawn that are pure moss, and I've never fertilized or done anything more than mow, with the exception of seeding and watering once in a while when I'd like a section to be a little thicker. I know there will be dust holes, but should I expect some large-scale carnage in spots?