Question: Are the Cantabrian Water Dog and Neapolitan Mastiff both dogs?

Context articles: Mastinaro
Mastiff
English Mastiff
Cantabrian Water Dog
Grief therapy dog
Molossus of Epirus
Moscow Water Dog
Tweed Water Spaniel
Cane da presa
Neapolitan Mastiff

A mastinaro (plural "mastinari") is a Neapolitan Mastiff breeder.
 Specifically, "mastinari" are the group of Neapolitan men who have worked since World War II to work as breeders at great personal sacrifice
Mastiff type means a large molosser dog.
 The term "mastiff type" has been used synonymously with the term "molosser".
 For example, the bulldog breeds, the Great Dane, the mountain dogs, the pit bulls and even smaller dogs such as the Boston terrier, may be considered "mastiff types" in this broad sense.
 The descriptive term, mastiff type, should not be confused with the breed, the Mastiff.
 All breeds are individual and should be referred to by their breed name to ensure correct identification.
The English Mastiff is a breed of extremely large dog (often known simply as the Mastiff) perhaps descended from the ancient Alaunt and Pugnaces Britanniae, with a significant input from the Alpine Mastiff in the 19th century.
 Distinguishable by enormous size, massive head, and a limited range of colours, but always displaying a black mask, the Mastiff is noted for its gentle and loving nature.
 The lineage of modern dogs can be traced back to the early 19th century, but the modern type was stabilised in the 1880s and refined since.
 Following a period of sharp decline, the Mastiff has increased its worldwide popularity.
 Throughout its history, the Mastiff has contributed to the development of a number of dog breeds, some generally known as Mastiff-type dogs, or, confusingly, just as "Mastiffs".
The Cantabrian Water Dog (Spanish: perro de agua cantábrico ) is a landrace breed of dog developed in the coast of Cantabria, northern Spain, as an assistant to fishermen.
 The breed was classified and recognized by the Breeds Committee of the Spanish Ministry of Environment on 22 March 2011.
A grief therapy dog (also known as an emotional support dog, companion dog, or comfort dog) is a form of animal-assisted therapy.
 Dogs have been proven to be able to assist people in overcoming grief, which has led to a recent rise in the use of therapy dogs; although animal-assisted therapy theory has been around since World War II.
 Grief therapy dogs can be found in locations such as funeral homes, hospitals, nursing homes, schools, and hospices, and may provide support in situations such as funeral services, counseling sessions, and disaster relief.
 Popular breeds used as therapy dogs include the Portuguese Water Dog, Bernese Mountain Dog, St. Bernard, and Golden Retriever.
The Molossus of Epirus (Greek: Μολοσσός της Ηπείρου) is a large dog breed originating from Greece.
 It is a livestock guardian that has been bred since the age of Alexander the Great for protecting livestock from carnivorous mammals including the wolf, European jackal and the brown bear in the mountainous regions of Greece, especially Epirus.
 The Molossus is a pure Greek breed and is believed to be one of the main ancestors of today's Molosser breeds, such as the English Mastiff and the Neapolitan Mastiff,
The Moscow Water Dog, also known as the Moscow Diver, Moscow Retriever or Moskovsky Vodolaz, is a little-known dog breed derived from the Newfoundland, Caucasian Shepherd Dog and East European Shepherd.
 It is now extinct, but was used in the development of the  Black Russian Terrier.
 The Moscow Water Dog was produced only by the Red Star Kennels, the state operated organization chartered to provide working dogs for the armed services.
The Tweed Water Spaniel, or Tweed Spaniel, is a breed of dog extinct since the 19th century.
 It is best known for being involved in the early development of the modern Curly Coated Retriever and Golden Retriever breeds of dogs.
 They were described as a generally brown athletic dogs from the area around Berwick-upon-Tweed near the River Tweed and close to the Scottish Borders.
 A type of water dog, the breed was not well known outside the local area.
 This breed may have been created by crossing local water dogs with imported St. John's water dog, another breed which is also now extinct.
The Cane da Presa Meridionale (Italian for "Southern Catching Dog") is the old, "functional" working variant of the Neapolitan Mastiff.
 Before 1946 there was no distinction between Neapolitan Mastiff, Cane da Presa and Cane Corso, these were simply three different names for the same dog.
 The modern Neapolitan Mastiff is unlike the original, a dog created by dog shows. Fans of the original Mastino have started an organisation which is trying to gather the remaining specimens which would fit the 1946 standard of the Neapolitan Mastiff.
The Neapolitan Mastiff or Mastino (Italian: "Mastino Napoletano" ) is a large, ancient dog breed.
 This massive breed is often used as a guard and defender of family and property due to their protective instincts and their fearsome appearance.