Chicken tractors... awesome

Chicken tractor... your thinking a what, so was i the first time i heard about it but the concept is awesome. The idea here is exactly as the name describes a tractor for your gardens or fields that is powered by chicken. So the idea is simple, you build a movable chicken pen and put your chickens inside and move it around your garden or your fields and the chickens do the rest, they scratch at the soil eating all the unwanted pests weeds and whatever else they find on the way leaving behind a rich  fertilizer in the form of chicken poo, then you move the chicken tractor along and let them do the next bit. Its awesome the chickens are happy they get to do what they do best and that's to scratch around in the soil all the while safe in a movable chicken coop and you save on feed for the chickens as they get most of what they need from the ground and you get your area fertilised for free, its a win win situation and the thing with chicken from what I've read these guys will eat pretty much anything so kitchen scraps is actually a preferred feed for these guys just for a bit of extra nutrients in there diets. Check out this site for a more detailed description and some plans on how to build one http://plansforachickenhouse.org/chicken-tractors/

if you decide to build one or you have one already please post your pick for us thanks