{"data":{"slug":"terceira-mastiff","name":"Terceira Mastiff","url":"https://techtools.cz/tools/dog-atlas/terceira-mastiff","api_url":"https://techtools.cz/dog-atlas-api/v1/breeds/terceira-mastiff","also_known_as":["Cão de Fila da Terceira","Rabo Torto"],"kind":"landrace","extinct":true,"group":{"key":"molosser","label":"Mastiff \u0026 Mountain","fci_group":2,"fci_group_name":"Pinscher and Schnauzer, Molossoid and Swiss Mountain and Cattle Dogs"},"size":"Medium","origin":"Portugal (Azores)","countries":["Portugal"],"height_cm":{"min":null,"max":55.0},"weight_kg":null,"life_expectancy_years":null,"temperament":["Watchful","Protective","Territorial"],"exercise_level":"Medium","wikipedia_views_60d":1289,"summary":"An extinct guardian dog from the Azorean island of Terceira, known for its short corkscrew tail. It is an ancestor of the São Miguel Cattle Dog and the Fila Brasileiro.","photo":null,"updated_at":"2026-10-15T14:34:20Z","ratings":{"energy":3,"exercise":3,"grooming":1,"shedding":3,"trainability":3,"barking":3,"kids":3,"other_dogs":2},"coat":"Short and smooth","colors":["Fawn","Yellow"],"fun_fact":"Its local nickname, Rabo Torto, means twisted tail, after its corkscrew tail.","sections":{"overview":"The Terceira Mastiff was a medium-sized molosser that lived only on Terceira island in the Azores, where it guarded homes and farms.\n\nIt is gone today, but its bloodline lives on through related Fila breeds.","history":"The dog descended from the Rafeiro do Alentejo and stayed confined to Terceira, where it worked as a house guardian. In the 1960s the Portuguese government supported an effort to revive it, but disagreements between officials and breeders ended the project.\n\nBy the 1970s it was declared extinct. It contributed to the Cão Fila de São Miguel and the Fila Brasileiro, and is separate from the Barbado da Terceira.","appearance":"A medium-sized Fila-type molosser standing about 55 cm tall, resembling the São Miguel Cattle Dog. Its most striking feature was a naturally short, corkscrew-like tail.\n\nThe coat was short and smooth, fawn or yellow with a light mask. Red, black and brindle dogs were considered impure. The nose could be black, brown or pink.","personality":"As a house and property guardian, it was most likely alert, protective and wary of strangers, like other Fila-type dogs.","care":"The breed no longer exists, so there are no care needs today. Its short smooth coat would have needed little grooming."},"recognition":{"fci_number":null,"fci_standard_url":null,"akc_url":null},"sources":{"wikipedia":"https://en.wikipedia.org/wiki/Terceira_Mastiff","wikidata":"https://www.wikidata.org/wiki/Q16893163","wikipedia_revision":1281896966},"profile":{"written_by":"AI model (Claude Sonnet) from the sources above","written_at":"2026-10-15T13:59:38Z"}}}