Neapolitan Mastiff (Mastino, Neo)

The Neapolitan Mastiff is a giant dog belonging to the Working Group. Its history begins in Italy, where the breed was developed for its characteristic work. Among AKC-registered breeds it sits at #128 by popularity. Adults typically stand 24–31 inches (61–78.7 cm) at the shoulder and weigh 110–150 pounds (49.9–68 kg), with males at the upper end of those ranges.

Published breed data puts a typical Neapolitan Mastiff lifespan at 7–9 years. The main levers behind that number are body size (smaller dogs usually outlive bigger ones), genetics, and how consistently a dog stays lean, exercised and current on preventive veterinary care. Against the average dog, giant breeds like this one sit on the longer-lived end of the spectrum. Owners who keep the weight off and the teeth clean reliably see the upper half of the range.

Do not expect a running partner. This breed is happiest with gentle daily strolls and a soft couch. Trainability is average — consistent, reward-based sessions work well. With socialization, children and this breed get along well; supervise the early years. Other dogs are usually accepted, particularly with early socialization.

Medium-sized homes suit this breed fine; true apartments depend on the dog and the schedule. Shedding is moderate; expect some hair on furniture, heaviest during seasonal coat changes. Grooming needs are minimal: occasional brushing and routine nail care suffice. No low-shedding claim applies here. Allergy sufferers should spend time with the breed before committing.

We benchmark every breed against the other 151 in our data: at an average 59 kg sits heavier than 97% of them. Size rank translates directly into budget: feeding and equipping this breed costs what that weight class costs anywhere. All figures on this page come from the AKC breed profile cited below, and the calculators linked here use those same numbers for feeding portions, crate sizing, age conversion and first-year costs. Because breed-specific health risks affect veterinary spending, comparing pet insurance while your dog is young and healthy is usually worthwhile.