Here is a picture from the .pdf below. Now, there's a poultry farmer with a nice sense of humour. The .pdf has a number of interesting poultry keeping ideas that lend themselves to being adapted to permaculture gardening, be it on a small or a larger scale. http://extension.oregonstate.edu/sorec/sites/default/files/Pastured_Poultry_101.pdf
A backyard chicken coop design with simple construction instructions. Via: http://files.meetup.com/1358383/Coop.pdf