Methodology
How we source and verify BSL data
Every record on BSL Check is sourced from primary municipal and state documents. We do not rely on secondhand summaries or advocacy organization claims.
Primary sources
Municode Library
The largest repository of US municipal codes. Primary source for city-level ordinance text.
American Legal Publishing
Second-largest municipal code database. Used for cities not on Municode.
State legislature websites
Official .gov sites for state statutes governing breed preemption laws.
City and county official websites
Direct city websites and animal control pages for verification.
AVMA, ASPCA, Best Friends Animal Society
Authoritative organizations cited for context — never as primary legal sources.
What we record per city
- Ordinance type — full ban, restriction, or no BSL
- Banned breeds — exact breeds listed in the ordinance
- Restricted breeds — breeds subject to conditions
- Requirements — muzzle, microchip, insurance, spay/neuter, enclosure
- Penalties — fines, impoundment, criminal charges
- Ordinance URL — direct link to the municipal code section
- Last verified date — when we last confirmed the record
- Verification status — whether the record has been manually confirmed
Verification process
City records are initially sourced from municipal code databases and flagged by confidence level. Records marked "verified" have been manually confirmed against the actual ordinance text. Records marked "needs verification" have been identified through automated scraping and should be treated as directional until confirmed.
All records are reviewed quarterly. When a city repeals or amends its BSL ordinance, we update the record within 30 days of becoming aware of the change.
This data is for reference only and is not legal advice. Ordinances can change without notice. Always verify the current status with your local animal control office or city attorney before making decisions.
Affiliate disclosure
BSL Check participates in affiliate programs with pet insurance companies including Embrace Pet Insurance, Spot Pet Insurance, Trupanion, Healthy Paws, Lemonade Pet, and Pets Best.
When you click a pet insurance link on this site and make a purchase or submit a lead form, we may receive a commission. This comes at no additional cost to you.
Affiliate relationships do not influence our BSL data, city records, or editorial content. We do not accept payment to modify or suppress ordinance information.
Report an error
If you find an inaccurate or outdated record, please let us know. We take data accuracy seriously and will review corrections within 5 business days.
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