For the first time, scientific evidence supports the discussion for the first 100% Chilean breed, the Chilean Terrier. This breed is popularly known as the rat-hunting dog or Condorito´s Dog.  Despite being recognised as breed a few years ago, research conducted in December 2016 provided information about its genetic variability. This raised a problem among breeders and “dog lovers”. The Chilean Terrier is known for its hysteric personality, being both grumpy and nervous, although breeders and owners describe them as loving, easy going, and very adaptable. The Terrier, specifically the Fox Terrier, is of English origin and came to Chile during the time of the Colony when Spanish immigrants brought certain dog breeds with them. It wasn't long before these European canines started to cross with Creole dogs. This mixture became what is now scientifically recognised as the first Chilean dog, the Chilean Terrier.  Dr Paola Mujica who researches in Silvoagropecuarian and Veterinary Sciences at the University of Chile, never imagined when she started her research eight years ago that she would identify the first canine breed from Chile. “Until that moment [the Chilean terrier] was considered a mixture, and it was not recognised as a breed by the Kennel Club Chile (KCC), an organisation that keeps an official genealogical record, registering dogs of pure breed in Chile. On the other hand, I discovered that in 2007 the Chilean National terrier club formed and this body establishes how a Chilean terrier should be, defining a standard and its pedigree”. It was at that moment Paola decided to undertake this research, conducted at the Favet-Inbiogen laboratory. “Firstly we met with the president of the Kennel Club to convince them of the importance of the research. They were so motivated by our proposal that they allowed me to go to the exhibitions and registry sessions to take samples; that was the only way I could access dogs from all over the country”. After the standards which the canine population must abide by were established, the selection of certain traits began.  The trait needed to be something which threatened its variability, and would effect a long-term characteristic which these dogs could have acquired during their development, until at least 200 years ago. “The main aims of my doctoral work were to determine the impact of the recent selection on the Chilean Terrier, to preserve the variability of this new national breed, and contribute to its right to be internationally recognised”, she added. Paola managed to characterise and determine the structure and genetic variability of this breed, taking representative samples of 24 founding dogs; those for whom there was no record, or whose parents not registered. This analysis was conducted through genotyping of SNPs (Single Nucleotide Polymorphisms), using a platform which can identify variants of 1.700 markers described in this species. This work was published on the University of Chile website: \citep{2011} Determination of genetic variability in the Chilean Terrier using microsatellites. “Indeed it is a different population from the Americans or Europeans, although the Chilean terrier does appear physically similar to dogs such as the Rat terrier in the US or the Jack Russel in the UK. These are dogs which could be confused with the Chilean Terrier. The information generated in this study provided important records about the recent evolutive history of this breed, contributing to the correct management of the population”, added Paola.