I gave my number of chickens a few days ago but have been having trouble getting the post-it box to appear. I have 25 new (hatched 9/8/10 or thereabouts) Barred Rocks, 7 Rhode Island Reds from last September and 7 Buff Orpingtons hatched in April of 2008. They are certified organic and I sell the eggs, but I don't know how long to keep them. I am only getting 6 or 7 eggs a day now from 14 adult hens, but they are moulting, and the days are getting shorter. I don't give them artificial light--let their bodies have a rest if that's what they would normally have, is my philosophy. But one of the Buffs was killed by one of my dogs recently, and she had no eggs in the pipeline. One died spontaneously the other day but I don't know why, so I gave her to the dogs for a treat. How long do they live? Could that one have died because she was old, or do I have to worry about some disease in my coop? I'd be grateful for any answers or speculations anyone may have as I am new to this: this is just my third batch of peeps.