Neapolitan Mastiff

Pinschers & molossoids

Giant

Median 9.3 y

FCI group 2 · Pinscher and Schnauzer, Molossoid and Swiss Mountain Dogs · Derived from the adult weight midpoint (60 kg)

Median survival across 577 UK dogs (VetCompass, McMillan 2024) · half live 6–11 y

The Neapolitan Mastiff or Mastino Napoletano is an Italian breed of large dog of mastiff type. It was recognised as a breed by the Ente Nazionale della Cinofilia Italiana in 1949, and accepted by the Fédération Cynologique Internationale in 1956.

Loyal

Dignified

Watchful

Summary from Wikipedia (CC BY-SA) · reference ranges from the Kintail breed dataset

Adult weight

Reference

Male

60–70 kg

Female

50–60 kg

The breed standard (FCI 197)

Weight for age

Stock data

Male

Female

Expected range

Expected range from the breed's own adult weight, kilograms. Growth reference: Hawthorne et al. 2004, WALTHAM (five giant-breed fits, n=35).

Heat cycles · females

Stock data

First heat

8–12 mo

typical

Interval

180 d

typical

Bleeding

~9 d

typical

Proestrus 9d

Estrus 9d

Diestrus 52d

Anestrus 110d

General figures for dogs, not for this breed — individual cycles vary widely.

Questions people ask

Adult males usually weigh 60–70 kg and females 50–60 kg. Most are close to their full size by around 13 months, though the last little bit of filling out takes longer. Growth reference: Hawthorne et al. 2004, WALTHAM (five giant-breed fits, n=35).

No Neapolitan Mastiff cycle figures are published here yet, so this is general guidance rather than a breed number: most females have a first season somewhere between six and fifteen months, and cycles then settle to roughly every 180 days. Smaller breeds tend to start earlier and larger ones later.

The median is 9.3 y. Median survival across 577 UK dogs (VetCompass, McMillan 2024) · half live 6–11 y. How the later years go comes down to weight, teeth, exercise and regular check-ups far more than to the breed.