How big is a full grown Neapolitan Mastiff?

A full-grown Neapolitan Mastiff is an impressive sight. These dogs are large and powerful, with males typically weighing around 150 pounds and standing about 26 to 31 inches tall at the shoulder. Females are slightly smaller, weighing around 110 pounds and standing 24 to 29 inches tall. They typically reach their full height by 12 to 16 months of age and will continue to fill out and gain muscle mass until they’re about three years old.

Several factors can influence a Neapolitan Mastiff’s final size. Genetics play a big role, with the size of the parents being a good indicator of how large a pup might grow. Nutrition is also crucial, as a balanced diet supports healthy growth. Overfeeding, especially during the puppy stage, can lead to overly rapid growth, putting stress on their developing joints. Exercise and overall health also contribute to their final size, with proper care ensuring they reach their full potential without any growth-related issues.