Three templates for service dog letters from healthcare professionals, covering the types of letters service dog users may legally need. A Pet Care Agreement is a formal contract that defines the terms of pet-sitting services between the pet owner and the pet sitter.For more information about service animals or about filing a complaint, call the ADA Information Line at 1-800-514-0301. Service Animal Registration Information. A dog walking contract will outline the expectations of both clients and dog walkers before service begins. This information packet gives an overview of the laws protecting your right to use a service animal, advocacy tips, and legal references. Failure to meet the requirements may result in problems gaining certificate endorsement or difficulties upon arrival in the destination country. 1. Providing Veterinary Services. The only species of service animal recognized under Title II and Title III of the Americans with Disability Act (ADA) are dogs and miniature horses. Pet Ownership Requirements.