By March 1942, they had been recognized as the official agency for choosing and training sentry dogs for the U.S. Army, Navy and Coast Guard. (fidouniverse.com)
As a breed the Canaan Dog proved highly intelligent and easily trainable, serving as sentry dogs, messengers, Red Cross helpers and land mine locators. (cdca.org)
The Air Force used own Sentry Dog Training Facility's «graduates» as the army failed to provide dogs for the need of Air Force. (snowyswan.com)