You've gotten some good answers. I agree with getting more than 2, 3 or 4 would be better. If you let them free range, yes they will eat your plants and veggies and scratch up your landscaping. That's the beauty of the chicken tractor concept, they are pastured but still not free to roam. However, we do have a chicken tractor but it is rather heavy to move, so we now keep it on a cement pad with hay in it, and they live there at night and and just let them free range during the daylight hours. Oh, and they poop everywhere. Our deck and patio seem to be favorite spots. If we are going away we just keep them locked in and have my FIL come over to feed and check them each day.