My approach is not about the preservation of breeds, or production on a commercial scale but simply that birds are pets that give eggs.
I keep poultry, as did my parents and my grandparents. It's a good job too as if I had just read books about poultry keeping I'd never have taken it up. They make it all sound so complicated, and difficult. Especially those that insist you make the hen hut to their exact proportions, or that you must give your birds this or that in precise amounts. And when you get to the chapter on Pests and Diseases it puts you right off.