Sunnyvale, CA Animal Ordinances: Cat Rules (2026)
Key Facts
- Minimum age to sell/transfer
- 8 weeks old
- Buyer under 18
- needs written parental/guardian consent
- Required cat vaccine
- panleukopenia, before transfer
- Return window
- 5 days for vet exam, 1 day to return
- Return dispute forum
- Santa Clara County Superior Court
- Cat licensing
- not required; Chapter 6.04 covers dogs only
Summary
Sunnyvale has no citywide cat license or leash law, but Chapter 6.03 regulates how cats change hands: a kitten cannot be sold, adopted out, or transferred before eight weeks old, transfers require proof of vaccination, and buyers who discover a contagious disease or serious defect within days can return the animal for a refund.
It is unlawful for any person or establishment, other than an exempt establishment listed in California Penal Code Section 597z, as may be amended from time to time, to sell, barter, exchange, offer for adoption or otherwise transfer ownership, whether or not for compensation, any dog or cat under eight weeks of age. Proof of age of the dog or cat may be required by the administrator... No person shall sell, barter, exchange or offer for adoption, whether or not for compensation, any dog or cat to any person who is under the age of eighteen years without the written permission of the minor's parent or legal guardian.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4856529; v14 updated 2026-05-19).
Full Breakdown
010(a) makes it unlawful for any person or establishment, other than one exempt under Penal Code Section 597z, to sell, barter, exchange, offer for adoption, or otherwise transfer ownership of any dog or cat under eight weeks of age, and the administrator may demand proof of age, including a veterinarian's certification. Subsection (b) bars selling or giving a cat to anyone under eighteen without the minor's parent or guardian consenting in writing, and subsection (c) requires all cat and dog sales to otherwise follow state law.
020 requires immunization before any transfer of a cat or dog over eight weeks old: cats must be immunized against panleukopenia, and the transferor must give the new owner a signed statement with the vaccination date and the animal's known health history, including any disease, sickness, or parasites and their treatment. 030 gives buyers a return right: within five days of purchase the buyer may have the animal examined by a California-licensed veterinarian, and if that exam finds a contagious or infectious disease or a serious undisclosed congenital defect, the buyer has one more day to return the animal for a refund of its cost; a seller who refuses can be sued in Santa Clara County Superior Court. 03's sale-age, vaccination, and return rules are the code's principal cat-specific provisions.
Violations & Fines
Selling or transferring an underage or unvaccinated cat, or selling to a minor without written parental consent, is an infraction under Chapter 1.04 per Section 6.10.020(c). A dispute over a seller's refusal to accept a timely, veterinarian-documented return is a civil matter the buyer can bring in Santa Clara County Superior Court under Section 6.03.030, separate from any city citation for the underlying sale-rule violation.
Frequently Asked Questions
How old must a kitten be before it can legally be sold in Sunnyvale?
What if the cat I bought turns out to be sick?
Does Sunnyvale require cat licenses like it does for dogs?
Sources & Official References
Other rules in Sunnyvale
California rules heatmap·Compare Sunnyvale to another location·View the California animal ordinances overview
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Cat Rules in Nearby Cities
How other cities in Santa Clara County handle cat rules.