To be a dog walker, you don't need professional training, just an eagerness to learn about things and implement them for the betterment of the dogs. If you love dogs and are an active person interested in the welfare of these furry animals, you can start by walking dogs in an animal shelter. This is a good and free way to start and learn to handle different breeds simultaneously. All the issues related to the dog will be made known to you by the workers at the dog shelters, and you can learn how to do primary animal first aid with animal care.  Then you can start by joining apps as a dog walker and earn training and certifications there.