Most of you are talking about birds that are good at free-ranging, but lots of us live in town and don't have the luxury of free-ranging our birds (even if my town allowed it, I wouldn't do it because we just have FAR too many predators here, the poor chickens would use all their food reserves escaping from all the critters waiting to eat them). So my birds are permanently penned. I'm already in a fairly precarious condition financially, but am pretty happy with my chicken setup as is. I chose birds that were dual-purpose and good layers (RIR and Black Australorp as well as a couple of sex-links). Since I can't have roosters due to city ordinance, I don't care if they ever go broody. My girls eat really well, I do give them free-choice Layena along with free-choice grit and oystershell. Even in winter they are laying enough eggs for me to be able to sell (for $3 a dozen, because homegrown eggs seem to be quite hard to find in town!) which is enough to cover the commercial feed with a little left over (which will add up to enough to buy replacement birds when needed). I got mainly dual-purpose breeds because I figured if TSHTF I could always eat the birds. I give them lots of scrap leftovers, a pint of scratch every day, greens every day (even if it's dandelions and chickweed I pull out of the neighbor's yards on my daily walks). I'm composting every bit of their poop and waste to use on my garden, where I'll be growing foods to feed both me and the chickens. It's a good setup, one that would never make me rich (although I also plan to turn at least a small profit on the veggies I grow), but is at least self-sustaining and will keep me and my small extended family fed.