YOU'VE FOUND THE RIGHT BREEDER and the right puppy. Now comes the paperwork. Your purchase will involve health certifications, a pedigree, registration papers, a sales contract, and veterinary records. Even if you don't plan to show or breed your pug, this paperwork can be useful throughout his life. The pedigree and health certifications can help you track hereditary problems if they develop later in life, and you'll need the registration papers if you decide you want to participate in AKC-sponsored dog sports.