Here is a link to the University of Florida's poultry program that also deals with small homeowner flocks. I found it helpful and hope you will too. The head vet also has links to his studies on commerical poultry operations that more advanced keepers may find of interest:
http://solutionsforyourlife.ufl.edu/agriculture/livestock/poultry.html
http://solutionsforyourlife.ufl.edu/agriculture/livestock/poultry.html