Prior to the development of DNA testing, the only method available for identifying the breed of a dog whose heritage was unknown was visual assessment. A shelter worker, veterinarian, or animal control officer examines the dog and assigns a breed designation based upon physical appearance and conformation. Even with widespread availability of DNA tests, most shelters and rescue groups continue to rely upon visual identification to assign breed labels to the dogs in their care. Given the life or death import of these decisions for some dogs, it is odd that the question of the reliability of these evaluations has not been questioned.