Food and Agricultural Code § 16521

(a) An inspector shall seize any bovine animal, horse, mule, or burro, or the hide or carcass of any of those animals, that is within any of the following classes:

(1) Found in the possession of a person who does not also have in his or her possession proof of ownership.

(2) Presented for inspection and that is not claimed by the consignor or consignee.

(3) An estray as defined in Section 17001.5.

(b) At the time of seizure, the person from whom the animal is seized shall be given a notice of rights under this chapter.