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Alameda County, CA Animal Ordinances: Mandatory Spay/Neuter (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Age threshold
6 months
Applies to
county shelter adoptions only
Under-6-month deposit window
65 days
Who pays
the new owner

Summary

Dogs and cats over six months old adopted from Alameda County's own animal shelter must be spayed or neutered before the new owner takes possession, at the owner's cost.

City-specific rules exist: Fremont, and Berkeley have their own mandatory spay/neuter rules that differ from Alameda County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Any dog or cat over the age of six months adopted from a county operated animal shelter shall be spayed or neutered before transfer of possession of the animal to the new owner who shall pay the cost of the surgery. The veterinarian who performs the surgery on a dog at the time of adoption shall inoculate the dog with a canine antirabies vaccine, the cost of which shall also be paid by the new owner.

View official code

Full Breakdown

Alameda County Code § 5.08.100 requires any dog or cat over six months of age adopted from a county-operated animal shelter to be spayed or neutered before the animal transfers to its new owner, who pays for the surgery; dogs also get a rabies vaccination at the owner's expense. For animals six months or younger, § 5.08.110 instead requires the new owner to leave a refundable deposit, which is forfeited, and the county may sue to repossess the animal, if it isn't fixed within 65 days of turning six months old. This is a shelter-adoption requirement, not a blanket mandate that every dog or cat owner in the county sterilize their pet.

Violations & Fines

For animals adopted young, failing to sterilize within 65 days forfeits the spay/neuter deposit, and the director of field services may file a court action to repossess the animal under § 5.08.110.

Frequently Asked Questions

Does Alameda County require every dog and cat to be fixed?
No. Section 5.08.100 only applies to animals adopted from the county-operated shelter, not to every pet owner countywide.
What if I adopt a puppy or kitten under six months old?
Section 5.08.110 requires a refundable deposit instead; you forfeit it, and the county can seek to repossess the animal, if it isn't fixed within 65 days of turning six months.

Sources & Official References

Other rules in Alameda County

Dog Leash LawsSome RestrictionsChickens & LivestockSignificant RestrictionsBreed RestrictionsLight RestrictionsExotic PetsSignificant RestrictionsWildlife FeedingLight RestrictionsBeekeepingSignificant RestrictionsParking Rules: Commercial & Oversized VehiclesSignificant RestrictionsParking Rules: Preferential Parking DistrictsSome RestrictionsParking Rules: Loading ZonesSome RestrictionsLandscaping Rules: Tree Removal & Heritage TreesSome RestrictionsWater Use Rules: Recycled Water RulesLight RestrictionsHistoric Preservation: Historic-Cultural MonumentsSignificant Restrictions

All Alameda County rules

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