The Backyard Chicken - http://www.backyardchickens.com/coopdesigns.html   The Backyard Chicken is a great site for the small flock keeper. The above link is too a wonderful photo story of how the coopwas built.

The City Chicken - Over 80 pictures of chicken tractors collected by the site's author.  A chicken tractor is  a bottomless cage or pen that allows chickens can eat  grass, weeds, bugs, etc.     http://home.comcast.net/~kkskinner/tractors.html

http://www.henspa.com/ - Egganic Industries  makes the ulimate in chicken tractors - perfect for the small back yard flock.   Visite this site to order or just for ideas!

Golden Cockerel Books Company - Purchase plans for constructing chicken tracktors (some times known in the UK as chicken arks) http://www.goldcockerelbooks.co.uk/bookpage.cfm?cftoken=96711661&cfid=248555&booknumber=11