From processing weeds and food scraps into eggs and fertilizer, to replacing the need for human and/or mechanized labor in tilling, this really is yet another example offarming with animals the right way.
Clever Tunnel System Makes Chickens Do The Gardening (Video) : TreeHugger
We've already seen how one farmer trains her chickens to eat slugs, and the internet is full of examples of chicken tractors—portable coops that can be moved to allow hens to till, fertilize, and weed a plot while providing pest control in the process. (see also this overview of chicken tractors at Planet Green.) But one Australian permaculturist has taken this idea to the next level—designing an intricate system of "chook tunnels" that let him funnel his ladies into any part of his garden. The amount of work that these creatures can do is actually quite amazing.
