Akwai ra'ayoyi da yawa, babu ɗayansu da ke da isassun tabbaci kamar yadda babu shakka. Ka’idar farko ita ce, a wajen karni na 15 zuwa na 16, sakamakon tsallaka nau’o’in karnuka da dama, daga cikinsu, a cewar masu kiwon kare, akwai Pyrenean Shepherds, Mastiffs, da Fotigal Water Dogs, nau’in da muka sani yanzu a matsayin An haifi Newfoundland.
Ka'idar ta biyu tana nufin lokacin da Vikings ke ziyartar waɗannan wuraren. Shakka, amma yana da hakkin ya wanzu. Vikings za su iya kawo karnuka daga ƙasashensu na asali tare da su a cikin ƙarni na 11, waɗanda daga baya suka haɗu da baƙar fata na gida, yanzu sun ɓace. Kuma na ƙarshe na ra'ayoyin 3 da ake da su sun gaya mana cewa Newfoundland ya faru ne sakamakon tsallakawa tsakanin Tibet Mastiff da Baƙar fata na Amurka, wanda muka ambata.
Wataƙila, kowane ɗayan ra'ayoyin gaskiya ne, amma a zahiri, muna da kyakkyawan kare, babba, kuma mai kirki. A karshen karni na 18, masanin ilmin halittu na Ingila Sir Joseph Banks ya sayi mutane da yawa na wannan nau'in, kuma a cikin 1775 wani adadi mai suna George Cartwright ya ba su suna a karon farko. A ƙarshen karni na 19, wani mai kiwo mai ƙwazo, Farfesa Albert Heim daga Switzerland, ya ba da ma'anar farko a hukumance game da nau'in, tsari kuma ya rubuta shi.
Duk da haka, a wancan lokacin Newfoundland na gab da bacewa, saboda gwamnatin Kanada ta sanya tsauraran matakai kan kiyaye karnuka. An ba kowane iyali damar samun kare guda ɗaya kawai, wanda, ƙari ga haka, dole ne a biya haraji mai yawa. Daya daga cikin gwamnonin Newfoundland (yanki) mai suna Harold MacPherson a farkon karni na 20 ya bayyana cewa Newfoundland shine nau'in da ya fi so, kuma ya ba da cikakken tallafi ga masu kiwon. An yi rajistar nau'in tare da Ƙungiyar Kennel ta Amurka a cikin 1879.