The surge in backyard chicken-keeping shows no signs of slowing down. Big personalities and the promise of fresh eggs make chickens attractive family pets, even in urban areas. To safeguard a flock of your own, make sure their housing is up to snuff. To start, you'll need a 4-by-8 foot screened-in run and a 4-by-4 foot critter-proof coop for up to three hens—although the more room, the better. Ready-made chicken housing is easy to find, but it's a lot more fun to make your own. Here's what experts recommend to keep your feathered friends in fine fettle.