Hello dear friends,
this article is rather inaccurate. Black-and-tan mastiffs have never existed in the Czech country. The black-and-tan dog was old watchdog „chodský pes“ (Czech Shepherd Dog, Bohemian Shepherd Dog) (with history to the 13th century (?)) and its reconstruction from the 20th century. But these dogs belong to the smaller longhair German Shepherd dog types, not molossers.
A molosser so different that it could be considered a separate breed has never lived in the Czech (Bohemian) territory. The Czech mastiff dogs were the same like other similar forms bred in Central Europe (called bullenbeisser, bearenbeisser, saupacker ....). They were all very diverse, too. Their employability was more important than the „blueblood“ breeding. Before they were replaced by modern breeds, these dogs had been called according to the purpose of use, not according to the blood.
Czech molosser working types:
„Doga“ – from the German word „Die Dogge“, the largest lines of molossers, (the word „mastiff“ was not used in the old Czech language)
„Řeznický pes“ – in the Czech language = a butcher's dog, a collective name for dogs used for riding and herding cattle and pull carts, ancestors of Boxers, Great Danes, Rottweilers, Giant Schnauzers, etc.
„Tarač“ – a defunct Czech word, a collective name for watchdogs, bandog
„Štváč“ - a defunct Czech word, = hound, a collective name for the hunters of dangerous wild animals (bears, aurochs, boars, wolves....)
„Býkohryz“ –a defunct Czech word, a free translation = Bull-biter
„Medvědohryz, medvědoštváč“ – a defunct Czech words, a free translation = Bear-biter, Bear-hound
„Kancohryz“, „divočákohryz, „kanečník“ – a defunct Czech words, a free translation = Boar-biters
„Prasečník“ – a defunct Czech word, moloss and pointer (or other hunting forms) cross, boarhound, this dog was also called „molossus oharz“ in the literature of the 14th century (a free translation = mastiff-pointer)
„Komorní pes“ – from the Czech language, meaning "Room-dog"; Aristocrats´companion - for living in interiors. (They wore gold collars in palaces, in contrast to guard dogs with silver collars.)
This shows that we can exclude the existence of some pure-bred „Czech Mastiffs“ in our country today as well as in the history. The Czech Republic bred modern national breed "český horský pes" (Czech Mountain Dog) nowadays. This dog originated from the crossing between a mountain mastiff „slovenský čuvač“ (Slovakian Chuvach, Slovakian Shepherd Dog, Tatranský čuvač) and a Canadian sledge dog "Alaskan".