And yes, there is a no dog policy.
For a carrier this could be a dream route. Everyone knows you by name. Everyone understands the job you do. Everyone is sympathetic. There are 500 glasses of water waiting for you on hot days. Christmas cookies arrive year round. "Thank you's" float through the air.
But it could be bad, too. Imagine every one of your patrons thinking they could do a better job than you? And God forbid, a misdelivery. And you better not be late. What do you think?