Dogs have been used as guards, hunters, draught
animals, eyes for the blind, drug and explosive detectors, rodent controllers- and even weapons! In Roman times and the Middle
Ages, mastiffs wearing light amour, carrying spikes and pots of flaming sulphur and resin ran into battle against mounted
knights. In World War II the Russians trained dogs to run suicide missions between the tracks of German tanks with mines strapped
on their backs.
Dogs"
hearing is very acute. They can register sounds of 35,000 vibrations a second (compared to our 20,000 and a cat's 25,000).
Dogs naturally have a wonderful
sense of smell. They have many more sensory 'smelling" cells than a man's 5,000,000. A Dachshund has 125,000,000,
a Fox Terrier 147,000,000 and a German Shepherd (often used as a "sniffer" dog) has 220,000,000. Truffle hounds
can find the fungus delicacy even when it's a foot underground.
The oldest reliable age recorded for a dog is 29 years, 5 months for a Queensland "heeler"
called Bluey in Victoria, Australia. The average dog lives to around 15 years of age.