Cover every aspect of dog's care, from walks, vet visits, and medication schedules. In this post, we cover what to include in a dog walking contract as well as best practices for collecting contracts and working with clients.We have created this guide to help get you started with some of the most crucial items to include in your dog walking contract. A Pet Sitting Agreement with Pet Sitter - Self-Employed is a formal contract between a pet owner and a pet sitter who is self-employed. A dog walking contract should outline the dog walker's major responsibilities and the process for carrying those out.