This post reminded me of what happed a few years ago to me. I had about 200 laying hens make a jail-break; it took me about 3 weeks to round them all up. Prior to that, I had a rather nice lawn; at the end of 3 weeks, I had scorched Earth. Mind you, my lawn was at least an acre. Apparently, nice, fresh tasty St. Augustine grass is irresistible to Chickens. They were so thorough in their quest for expensive salad that I no longer have St. Augstine grass. Every last scrap was eaten, stolens and all. It took several years to get my lawn back to an acceptable level. It did give me an opportunity to change species of grass to a less demanding type but what a weird way to have a total lawn removal. That was also the year I had very little to take to the farmers markets....except eggs. Care to guess why? lol....