Pit Bull-type breeds, such as the American Pit Bull Terrier, American Staffordshire Terrier, and Staffordshire Bull Terrier, have faced bans or restrictions in various countries and regions, including the United Kingdom, Canada, and some municipalities in the United States.
The Japanese Tosa, a large and powerful breed, is banned or heavily regulated in several countries, including the United Kingdom, Australia, and New Zealand, due to concerns about aggression and fighting tendencies.
The Fila Brasileiro, a Brazilian breed known for its guarding instincts, has faced bans or restrictions in several countries, including the United Kingdom and Denmark, due to concerns about aggression and attacks.
The Dogo Argentino, a large and muscular breed originally developed for hunting, has faced bans or restrictions in various countries, including the United Kingdom, Australia, and New Zealand, due to concerns about aggression and attacks.
While not banned outright, Siberian Huskies and other Arctic breeds have faced restrictions or requirements in certain regions with warmer climates due to concerns about their ability to adapt to the climate and potential welfare issues.