Akita vs Bullmastiff

The AKC's own breed standard warns that Akitas 'may be intolerant of other dogs, particularly of the same sex' — that's not a rare temperament quirk, it's written into the official standard, and it's a major reason the breed is refused or surcharged by roughly 4 in 5 home-insurance breed-restriction lists.

A peer-reviewed veterinary study of Bullmastiffs found a median lifespan of just 8.5 years, with cancer responsible for well over a quarter of all deaths — this breed's short lifespan and real jowl-drool are two things buyers drawn to its imposing, protective look are rarely told upfront.