Although not a trained scientist, Horák worked for many years as a research assistant at the Czechoslovak Academy of Sciences and used knowledge gained there in his dog breeding.

Czechoslovakia was ruled by a communist regime at the time; when Horák's dogs became more popular around the world, he began to receive a large volume of mail from outside the country, which earned him the attention of the secret police.

The Cesky Terrier was recognised by the Kennel Club (UK) in 1990[8] and on January 1, 2000, it gained rare breed status.

The FCI Breed Standard gives the ideal measurements for the Cesky Terrier as: Head Neck, Topline and Body Forequarters Hindquarters Coat Color Gait The breed standard calls for a calm dog, and aggression is a disqualifying fault.

[12] This breed occasionally suffers from the Scotty Cramp, a minor problem causing awkward movement, but it is not life-threatening.

[13] Breeding stock should be checked for hip dysplasia, patella luxation, cardiac abnormalities, PLL (primary lens luxation) and other eye disorders such as cataracts, thyroid issues, degenerative myelopathy, and Type 3 von Willebrand disease, all of which have been documented issues in the breed.