California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 17041

Except as provided in Article 5 (commencing with Section 17121) of this chapter, any person that finds any estray domestic animal upon his premises, or upon premises to which he has the right of possession, or upon any highway which is adjacent to such premises, may take up the animal and have a lien for all expenses which are incurred in taking up, keeping, and caring for it.