Pets: The business of dog-walking

We explore professional dog-walking around the world. We hear from walkers from the United States, Argentina and Europe about how they operate, the growing market, and the challenges of making a career from taking other people's pets on daily walks - sometimes several at a time. And we join a dog walker in Paris, Caroline, to find out why the relationship between walker and dog is the most important when securing clients.Expect plenty of barks.(Image: Caroline, a professional dog-walker in Paris, with three dogs)Presented and produced by Sean Allsop