I live in the middle of a small town. The front yard gets more sun, so that's where the garden is. In the back yard is my chicken coop and run. The coop and run are both dirt floored. I practice the deep litter method, which is basically keep throwing stuff in the coop/run until I feel like digging it out.
The coop is 8'x7' and the run is 8'x12' for a total of 152 square feet. I have 25 hens and often let them out in the fenced backyard to enjoy themselves. My dogs keep them safe.
I toss in grass clippings, leaves, pea hulls, corn shucks, corn cobs, sawdust, wood shavings, garden plants that are done for the season, kitchen trimmings, anything and everything organic. What they don't eat, they poop on and scratch to pieces. I clean it out 2-3 times a year and spread it directly on the garden. What I have extra, I put in wire bins until needed. By constantly adding more organic material, the coop/run almost never has a smell to it. Sometimes right after digging out the run/coop, the bottom layers throw out an odor. I toss in some more leaves or whatever and start over.
Chickens certainly don't have to be a lot of work and they are a valuable asset to my garden. They eat garden leftovers, make compost and give me eggs! I would definitely recommend chickens for garden composters!