I never have, but if I was really busy and didn't have time to take my dog out, or if my dog didn't have a yard to roam around in, then I would pay a dog walker.

Two neighbors of mine have their own dog walking and pet sitting business, they earn pretty good money, especially during the holiday seasons. A lot of people like to have pet sitters sleepover their place, watch over their pets and walk them. Even I have had one of them do dog sitting for my poodle several times.