Cal. Health & Safety Code § 122355
(a) Each pet store operator shall ensure that records of all veterinary visits to the pet store are documented in writing. Veterinary treatment records shall be kept for each animal or group of animals that receives medications or immunizations while in the care of the pet store. These records shall include summaries of direction received orally from veterinarians, and shall include all of the following, to the extent it is provided by the veterinarian:
(c) The pet store shall provide to the purchaser of an animal at the time of sale information concerning the store’s animal return policy, which shall be made available to customers either through in-store signs or handouts to customers. The pet store shall also provide to purchasers of cats, dogs, and all individually housed animals all of the following information: