as of January 2023
The pass-fail rate is not a measure of a breed’s aggression, but rather of each dog’s ability to interact with humans, human situations, and the environment. See a description of the test on the TT Test Description page.
The data presented on our web site is raw data; it is not a scientific study nor is there any statistical significance attached. We have no control over who brings their dog to the test and there is no accurate data as to a dog breed’s population in the US.
Data is cumulative since the start of ATTS in 1977. Breeds are listed in alphabetical order:
Page 1: Afghan Hound – Belgian Malinois
Page 2: Belgian Sheepdog – Carolina Dog
Page 6: Lowchen – Poodle, Toy