Cal. Penal Code § 597z

(a) (1) Except as otherwise authorized under any other provision of law, it shall be a crime, punishable as specified in subdivision (b), for any person to sell one or more dogs under eight weeks of age, unless, prior to any physical transfer of the dog or dogs from the seller to the purchaser, the dog or dogs are approved for sale, as evidenced by written documentation from a veterinarian licensed to practice in California. (2) For the purposes of this section, the sale of a dog or dogs shall not be considered complete, and thereby subject to the requirements and penalties of this section, unless and until the seller physically transfers the dog or dogs to the purchaser. (b) (1) Any person who violates this section shall be guilty of an infraction or a misdemeanor. (2) An infraction under this section shall be punishable by a fine not to exceed two hundred fifty dollars ($250). (3) With respect to the sale of two or more dogs in violation of this section, each dog unlawfully sold shall represent a separate offense under this section. (c) This section shall not apply to any of the following: (1) An organization, as defined in Section 501(c)(3) of the Internal Revenue Code, or any other organization that provides, or contracts to provide, services as a public animal sheltering agency. (2) A pet dealer as defined under Article 2 (commencing with Section 122125) of Chapter 5 of Part 6 of Division 105 of the Health and Safety Code. (3) A public animal control agency or shelter, society for the prevention of cruelty to animals shelter, humane society shelter, or rescue group regulated under Division 14 (commencing with Section 30501) of the Food and Agricultural Code.