I love chickens. I thought they were sort of pretty before moving to the country (probably genetic heritage from my grandmother, who raised them for egg money). But after moving to the country, and getting some, I learned how very valuable they are.
Everyone thinks of chickens as providing eggs, of course, and sometimes meat. But they serve many more purposes on the country homestead.
The first spring and summer we were here (pre-chickens), what with the horses and the cows and the neighbors' horses and cows, flies were a real problem. I had fly strips, fly traps, wasp predators, you name it, if it said it got rid of flies, we had it! The next year, we had chickens who were large enough to run around free-range (makes for much better eggs). And that year we had 3 flies, in barn and house. That's right - 3. The chickens get to them before they actually turn into flies.
Then there's the matter of this black gumbo clay that we have here in our part of Central Texas, north of Austin. Beautiful, but almost impossible to garden with because it's so sticky. One year after we'd had chickens for about a year, in the fall, my husband turned over a garden-sized plot, just turning the sod a bit. We pulled it back, put the contents of the cleaned out chicken coop (we bed with wood shavings) in the trenches, covered them with newsprint, watered it all down, then put the sod back on top. In the spring, the soil could be turned easily with my bare hands - and the plants grew phenomenally.
Recycling's a little bit different in the country, as well. Kitchen scraps that don't go to the dog or cats go directly to the chickens. Preconceptions aside, chickens are NOT vegetarians. (I have a running joke with the guys at the meat department at our local Whole Foods. The reason that "vegetarian free range chickens" are more expensive than regular chicken is because they have to pay people to follow the chickens around to take the bugs and other small protein-providing critters out of their beaks to keep them vegetarian. Suffice to say, once you've had free range chickens, you'll realize that "vegetarian" and "free range" are two contradictory terms!) Anyway, the chickens take all those kitchen scraps and recycle them into big, delicious, orange-yolked, healthy eggs. (We had our eggs tested once - they came in at half the cholesterol of the commercial eggs tested by the same facility.)
In addition, if you're at all into crafting, you can get some absolutely beautiful feathers just for the picking up, if your flock is as varied as ours is - we have red chickens (Production Reds, produce eggs almost year round), Silver-Laced Wyandottes, Americaunas (lay blue and green eggs - natural Easter eggs!), Buff Orpingtons, and, over the years, many others. Just don't get any Dark Cornish (black chickens that look sort of like the dinosaurs of the chicken world - think the critters in Jurasic Park). We had five Dark Cornish roosters out of our first batch of straight run chicks. We called them the Jets - they strutted around the barnyard looking like they were swaggering in their black leather jackets. So chickens provide entertainment, as well. (Whoever says life is boring in the country has never lived there - there's always something going on!)
So, if you're thinking of relocating from city to country, among the other things you should think about is getting a flock of chickens - the all purpose country animal.