Breed Specific Legislation (BSL) is a term for laws or ordinances that regulate or ban certain dogs based on their breed. BSL typically targets pit bull breeds, such as American Pit Bull Terriers, American Staffordshire Terriers, Staffordshire Bull Terriers and English Bull Terriers.

Owners of banned or restricted breeds commonly try to avoid drawing attention to their dogs by keeping them hidden away, forgoing proper veterinary care and not properly exercising or socializing their dogs. BSL has also resulted in healthy, adoptable dogs being euthanized.

BSL is typically enacted to help decrease dog attacks, however there is no evidence that BSL help communities become safer, and BSL is difficult to enforce. The American Veterinary Medical Foundation (NVMA) in collaboration with the Center for Disease Control and Prevention (CDC) issued a statement in opposition of BSL due to inaccuracies in dog bite data, as well as difficulty in identifying dog breeds.

Arizona has become the 20th state in the US to ban BSL. In 2016, Senate Bill 1248 was passed which forbids Arizona cities and counties from enacting or enforcing BSL. Senate Bill 1248 also amended ARS 11-1025 by prohibiting a dog's breed to be considered in certain legal proceedings as well as ARS 20-1510 by prohibiting a dog's breed from being the sole consideration in the underwriting and actuarial process for homeowner's and renter's insurance policies.