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Modesto, CA Animal Ordinances: Microchipping (2026)

Light Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing section
Modesto Code § 5-4.503(d)(7)
Applies to
Litter (breeding) permit holders only
Administering agency
Stanislaus County Dept. of Animal Services
Uncorrected violation penalty
$500.00 (§ 5-4.504(a))
Standalone infraction fines
$100/$200/$300 (§ 5-4.504(e))
Exempt animals
Police, guide/service, shelter dogs (§ 5-4.503(e))

Summary

Modesto does not require every dog or cat to be microchipped. But under Municipal Code § 5-4.503, anyone holding a litter permit to breed a dog or cat must have that animal microchipped (or use another identification method Stanislaus County Animal Services accepts) and registered with the county.

(a)No person shall cause or allow any dog or cat owned, harbored or kept within the City of Modesto to breed without first obtaining a litter permit. ... (7)Any litter permit holder shall have his/her dog or cat microchipped or have some other form of identification acceptable to the Stanislaus County Department of Animal Services and shall register the dog or cat with the Stanislaus County Department of Animal Services.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 71).

Full Breakdown

503 lets an owner breed a dog or cat only after obtaining an annual permit issued by the Stanislaus County Department of Animal Services Director. Subsection (d)(7) attaches a specific identification condition to that permit: the permit holder's dog or cat must be microchipped, or carry some other identification the County accepts, and must be registered with the County. This obligation runs with the breeding permit, not with pet ownership generally; dogs used by law enforcement, documented guide or service dogs, animals in the care of governmental shelters or humane societies with an active spay/neuter and adoption plan, and dogs enrolled in a licensed guide-dog breeding program are exempt from the litter permit requirement entirely under subsection (e).

504. 00 penalty by mail, which is not waived even if the animal is later transferred or abandoned. If the owner still has not microchipped, spayed or neutered, or obtained the permit within fifteen days after that penalty notice, the continuing violation becomes a separate infraction. 00 for each occurrence after that. The County Animal Services Director can also revoke a litter permit outright for noncompliance, following written notice and an informal hearing, with an appeal available to the Animal Court within five working days of the decision.

Violations & Fines

Failing to microchip (or otherwise identify) and register a permitted breeding dog or cat is enforced as an infraction: $100.00 for a first occurrence, $200.00 for the second, and $300.00 for each occurrence after that under § 5-4.504(e). Separately, an uncorrected litter permit violation draws a $500.00 penalty after 30 days, escalating to an additional infraction if the microchip, spay/neuter, or permit obligation remains unmet 15 days after that.

Frequently Asked Questions

Does Modesto require microchipping every dog or cat?
No. Modesto Code § 5-4.503 only requires microchipping (or an equivalent identification the County accepts) for dogs and cats covered by an annual litter permit, meaning animals a resident has been authorized to breed. Ordinary pet owners who are not breeding under a permit have no citywide microchip mandate.
Who enforces the litter permit microchip rule?
The Stanislaus County Department of Animal Services administers the litter permit program for the City of Modesto and issues both the permits and any penalties. City of Modesto Animal Control can also identify violations under § 5-4.504(a).
What happens if I never microchip my permitted breeding dog?
You first get 30 days to correct the violation after notice. If you do not, the County imposes a $500.00 penalty. If the dog still is not microchipped, spayed, neutered, or permitted within 15 more days, the violation becomes an additional prosecutable infraction under § 5-4.504.
Can my litter permit be revoked for noncompliance?
Yes. Under § 5-4.504(b), the County Animal Services Director can revoke a litter permit for violating animal-care ordinances or permit conditions after written notice and an informal hearing; you may appeal to the Animal Court within five working days of the decision.

Sources & Official References

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