I grew up on a chicken farm. 1000's of chickens. To this day, I probably have eggs for breakfast only about once a year.
But the smell. Actually, on a smellorama manure scale, I'd put pigs at the top, further down would be cows, then sheep, then chickens. Most chicken farms have their hens inside a good chunk of the time. I wouldn't like to spend time inside a hog barn, but chickens really aren't that bad. Many times you'll find zoning where horses, cows, sheep, llamas, etc all acceptable, but NOT HOGS. Too stinky. So the quality and intensity of the odor may play a part in the adjustment. Our main chicken house was only about 150' from the house, and I don't recall a noxious odor....but then again, one does become acclimated to odors over time.