This is an interesting subject...a previous post brought up the idea of using a paddock system for keeping chickens, a major benefit of which would be a constant rotating supply of fresh forage; this being both healthy for the chickens, good for the flavor/quality of meat and eggs as well as saving on feed costs. Small garden plots could even be incorporated saving some labor as well. My question....IS THIS SUSTAINABLE IN THE LONG TERM? Most everyone with chickens in a fenced area knows they tend to obliterate the vegetation by foraging as well as by eventual over-application of their own brand of fertilizer. The equation to me seems to be the same for both tractors and paddocks. It is simply a matter of square feet/bird. If you have a tractor filled with 5 birds and only 300 square feet to till with that tractor, you're going to obliterate the vegetation in that area. Same if you had 5 birds and 4 paddocks of 75 square feet. If it is a matter of square feet/bird, what's the magic number to allow a paddock or tractor to be a success? Anyone have experience with long term sustainable management of these systems?