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Neapolitan Mastiff

Size: Giant

Weight: 110 - 150 lbs.

Height: 26" - 29"

Life Span: 9 - 11 years

Health Problems: Hip dysplasia; pano-ostiosis (condition that causes pain in the joints and muscles during growth between 4-18 months that goes away on its own); cherry eye (eye tissues protrude and become inflamed and red); chronic drooling

Origin: Italy (Ancient Times)

Also Known As: Mastino Napoletano, Mastino, Italian Mastiff, Neo

Group: Herding / Guardian

Category: Companion Dog, Guard Dog

Exercise Needs

The Neapolitan Mastiff requires walks twice per day as an adult. Do not over-exercise puppies under the age of one, as it may cause abnormal bone and joint development.

Grooming Needs

No special grooming requirements.


Peaceful and calm toward its family, the Neapolitan Mastiff has a killer instinct when it comes to intruders and threatening animals. While males are more aggressive than females, both sexes can be difficult to handle due to their protective nature and large size. Puppies need to be socialized to humans and given training early in order to establish good obedience and manners. It is important to establish control over this willful breed before it becomes too big to handle.

Compatibility with Kids

Can get along well with children if raised with them from a young age. Is better suited to older children. Due to size and appearance, can be scary for toddlers and babies. Supervise play with kids at all times to avoid accidental injury.

Pet Facts

This breed has a big appetite and will eat up to 10 cups of food a day.

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