1. 1. Enter buyer's and seller's full contact information. There are a few items that should be in every puppy contract.Seller guarantees that the Dog is a purebred dog, offspring of the purebred sire and purebred dam set out on page 1 of this Agreement. Get this premade puppy contract template in PDF instantly to your device and fill it out as you need,. A contract for an animal creates a threeway relationship for the animal, the new owner(s), and the breeder(s). (c). Seller guarantees that the Dog is a purebred dog, offspring of the purebred sire and purebred dam set out on page 1 of this Agreement. (d). What belongs in a contract depends on why you're buying the dog. The purchaser fills out the certificate and gives it to the seller. Renter's Rights and Protections. Under New York State Law.