When I first got chickens I decided I would have to be able to leave them at least a week if needed. They are my slaves not the other way around. I have left them for 8 days when evacuated for fire. They could go up to two weeks on their own. 12 chickens, 18 gallons of water and about 30# of food in two feeders. Pred proof coop and no yard time if they are left alone, roll out nest box keeps the eggs collected. I leave them alone for 2-3 days at a time and never give it a second thought. I never clean the coop, ever. It is DLM over dirt floor and its been 20 months, perhaps this spring I will clean out the DLM and start over. I feel like I am doing everything right, for me anyways. What about you? How long can you leave your chickens to fend for themselves?