as of December 2017

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 3: Catahoula Leopard Dog – Dandie Dinmont Terrier

Page 4: Doberman Pinscher – Gordon Setter

Page 5: Grand Basset Griffon Vendeen – Lhasa Apso

Page 6: Lowchen – Poodle, Toy

Page 7: Portuguese Podongo (Grande) – Skye Terrier

Page 8: Sloughi – Yugoslavian Tricolor Hound

Totals