I see different size feeders and I would like to know what size I should get for 13 hens. I know that many people build their own but my wife has offered to purchase feeders and waterer since I paid for all the coop construction. How many gallon waterer do I need for my chickens? The longest that I may be away without feeding or watering would be for a long weekend. Thanks for your info! Jon Atlanta, GA My first flock just went into their coop yesterday, a 8 foot by 8 foot coop with a good size run!