Having watched that Future of Food documentary tonight, and on top of feeling despairing about how much chook food i am buying for my poultry (pain in the purse), i think i need to seriously figure out how to grow more chook and duck food. I've got room to do it i think. Can anyone make an estimate of how much area to devote to growing grain for chooks per chook and per duck? And what could i grow here in the tropics. I believe that sorghum will grow and corn. Anything else. Any tips or advice, feel free to share here. I think i need to get serious about this.