Previous Owner's Information. Own is where both the breeder and the new owner retain ownership of the dog until agreed upon terms for payment have been met then.Use our pet custody agreement to specify who owns and is responsible for a pet after a relationship ends. Pet Custody Agreement Template. This sounds like a breach of contract. Use our pet custody agreement template to draft clear terms for shared pets. Create and download your agreement for free! Use this pet custody agreement template to create a custody document and determine your pet's care plan. Q: Is a breeder contract my exwife signed during our marriage valid if I was awarded the dog in the divorce? Unlike other property, what is best for the dog or other animal has to be an important consideration in the terms of the contract.