Cal. Health and Safety Code § 122125

(a) This article shall be known and may be cited as the Lockyer-Polanco-Farr Pet Protection Act. (b) Every pet dealer of dogs and cats shall conform to the provisions of this article. As used in this article, “ pet dealer” means a person engaging in the business of selling dogs or cats, or both, at retail, and by virtue of the sales of dogs or cats is required to possess a permit pursuant to Section 6066 of the Revenue and Taxation Code. For purposes of this article, the separate sales of dogs or cats from a single litter shall constitute only one sale under Section 6019 of the Revenue and Taxation Code. This definition does not apply to breeders of dogs regulated pursuant to Article 1 (commencing with Section 122045) nor to any person, firm, partnership, corporation, or other association, that breeds or rears dogs on the premises of the person, firm, partnership, corporation, or other association, that has sold, transferred, or given away fewer than 50 dogs in the preceding year. (c) For purposes of this article, “purchaser” means a person who purchases a dog or cat from a pet dealer without the intent to resell the animal. (d) This article shall not apply to publicly operated animal shelters and humane societies.