This is really an ingenious method to till, rid of bug and fertilize your soil all at the same time by letting your chicken do all the work. Bruce Morgan has created tunnel frames he can move and then funnel the chickens into so the can till the soil, eat the bug and leave their fertilizer in which ever section of the garden that needs it all without having to chase them or let them wander all over the place. The tunnels are no so large that one person can’t move them around by themselves. Very cool.
Storey’s Guide to Raising Chickens, 3rd Edition
Chicken Coops: 45 Building Ideas for Housing Your Flock
New Chicken, Poultry Coop, Hen House Pen, Rabbit Hutch, Salt Box Roof