I live in suburbia and have a small flock in a fenced yard and with secure coop/run, a Labrador, a Cavalier spaniel, and an in/out cat. Definitely my chickens are easier than the others. 
As folks have mentioned, with some preparation they can be left alone for days, they don't shed in the house, no litter box, no using furniture as a scratch pad, no hacking up a hairball on your bed, no barking at 2 a.m., no jumping on visitors, no baths or grooming bills, or hundreds in vet checkups for annual vaccines....shall I go on?
I collect their eggs and let them out to free range in the afternoon and they put themselves to bed at nightfall. I just have to latch their run. (Can't let them out more because of the Lab, who wants to "play" with them, so we split time.) I change their bedding about monthly and am making great compost. (Can't do that with dog doo!) I fill their food as needed and give fresh water.  And of course treats like left over vegetables or fruit. Much lower maintenance. 
But perhaps the most surprising thing is that I have grown as attached to the ladies as I am to the others.  They follow me around, love to be petted and talked to, and do indeed come to my back door looking for me. My grandchildren adore them, carrying them around or just sitting and taking to them. Perhaps this is different with farm chickens or large flocks, but I can very much endorse backyard chickens if you live in a neighborhood but dream of having a little bit of country life!