A dog can suffer from tonsillitis, but not appendicitis. They don't have an appendix.

Greyhounds have the keenest eyesight of any dog breed.

Dogs that reside in cities live about three years longer than dogs that live in the country.

In Brooklyn, N.Y., it's illegal to let a dog sleep in your bathtub.

A dog can't hear the lowest key on a piano.

Dog food is the most profitable food on the market. People spend four times as much on dog food as they do on baby food.

Every hour, 12,500 puppies are born in the United States.

Dogs are mentioned 14 times in the Bible.

The word for "dog" in the Australian aboriginal language Mbabaran happens to be "dog."

The chow is the only dog with a black tongue.

The first year of a dog's life is equal to 21 years of human life (the dog grows to adulthood.) Each additional year is equivalent to four human years.

Nose prints are the most reliable way to identify dogs.

The five most popular dog tricks in the U.S. are sit, shake (paw), roll over, speak and lie down.

Crab was the only named dog in any Shakespearean play. The play was Two Gentlemen of Verona.

Dogs like squeeze toys because they sound like animals in distress.

A cat is more inclined to watch TV than a dog, claim the experts. (A cat relies more on vision, dogs rely more on smell.)

A U.N. survey revealed fewer British mailmen are bitten by dogs than postal carriers in any other nation.

Scientists insist that no dog has ever been bored.

Calling a puppy to punish it teaches the dog not to come when it's called. It's best to reward your dog by bringing it to you, and to punish it by sending it away.