St. Louis, MO Animal Ordinances: Mandatory Spay/Neuter (2026)
Key Facts
- Pigs allowed
- One per parcel
- Males
- Neutered by 4 weeks old
- Females
- Spayed by 120 days old
- Pedigree
- Must be purebred, litter papers required
- Penalty
- $100-$500 fine or up to 90 days jail
Summary
St. Louis allows only one pot-bellied pig per parcel, and the privilege is conditioned on fixing it: males must be neutered by four weeks old, females spayed by 120 days old.
One pot-bellied pig, per parcel of property, may be kept in the City of St. Louis, provided that males over the age of four (4) weeks (28 days) are neutered and females over the age of one hundred twenty (120) days are spayed. All such animals must be proven purebred lineage, and the owner must be able to produce litter papers to verify pedigree. Pigs over the age of one hundred twenty (120) days must be registered and licensed as required of dogs and cats.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 11).
Full Breakdown
Under Revised Code § 10.20.015.B, one Vietnamese pot-bellied pig per parcel of property may be kept in the City of St. Louis, but only if males over four weeks (28 days) old are neutered and females over one hundred twenty (120) days old are spayed. The pig must also be proven purebred, with the owner able to produce litter papers verifying pedigree, and once past 120 days it must be registered and licensed with the Health Commissioner the same as a dog or cat. If the pig is later found to be a nuisance after a complaint is investigated, it must be removed from the City within 48 hours.
Violations & Fines
Violations of Title 10's animal-keeping part are punished by a fine of $100 to $500, up to 90 days in jail, or both, under § 10.20.020; a pig deemed a nuisance must be removed from the City within 48 hours of that finding.
Frequently Asked Questions
Do pot-bellied pigs have to be spayed or neutered in St. Louis?
How many pot-bellied pigs can I keep in St. Louis?
Sources & Official References
Other rules in St. Louis
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