City Caucus has done an article on the issue of backyard chickens in Vancouver and come up with some negative comments on the idea.
From my experience, people do not even notice the chickens. My pen is only about 7 feet from the sidewalk and very people notice them.
I have now harvested enough eggs to have broken even on all my costs in this venture. I have hit 140 dozen eggs this week - a value of $490 to $700.