The gun's purpose was to eliminate sentry dogs or guards without alarming the main target.

It was discovered in 1971 in Germany during an outbreak in sentry dogs.

He understood his error before he had gone a dozen paces when he heard the growl of a sentry dog.

Napoleon utilised dogs for their superior senses, putting them to work in roles similar to that of modern sentry dogs.

"These are Army-trained sentry dogs," the security man said.

One of the earliest military-related uses, sentry dogs were used to defend camps or other priority areas at night and sometimes during the day.

The success of sentry dogs was determined by the lack of successful penetrations of bases in Vietnam and Thailand.

The institution is surrounded by a double fence, which is patrolled by sentry dogs.

Chips shipped out to the War Dog Training Center, Front Royal, Virginia, in 1942 for training as a sentry dog.

Chips served as a sentry dog for the Roosevelt-Churchill conference in 1943.