20 Rare Dog Breeds You Have Probably Never Heard Of

18. Neapolitan Mastiff

The Neapolitan Mastiff is famed for loose, wrinkled skin and massive size. With roots in ancient Rome, they have a prehistoric look. Gentle giants, they can weigh up to 150 pounds and stand 24 to 31 inches. Their wrinkles once offered protection in battle. Despite an imposing presence, Neapolitans are loving and gentle with family. Protective but rarely aggressive without cause, they carry short coats in black, blue, mahogany, and tawny. Early socialization and positive training guide their strong wills.
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