How Much Do You Know About Dogs?

Dogs only sweat from the bottoms of their feet, the only way they can discharge heat is by panting.

Dogs have about 100 different facial expressions, most of them made with the ears.

Dogs have about 10 vocal sounds.

Dogs do not have an appendix.

According to the World Canine Organization FCI (Fédération Cynologique Internationale), there are approximately 400 recognized breeds of dog worldwide.

Contrary to popular belief, dogs aren't color blind; they can see shades of blue, yellow, green and gray. The color red registers on a grayscale in a dog's vision

Most domestic dogs are capable of reaching speeds up to about nineteen miles per hour when running at full speed.

Domesticated for more than 10,000 years, the dog was one of the first animals domesticated by humans.

Using their swiveling ears like radar dishes, experiments have shown that dogs can locate the source of a sound in 6/100ths of a second.

The Basenji, an African hunting dog, is the only dog that cannot bark. This trait is probably due to the shallow laryngeal ventricle in its larynx.

In 2004, nearly three times as many Labs were registered (146,692) as any other breed. This marked the 15th consecutive year that the Labrador Retriever topped the rankings.

Reaching speeds of up to 45 miles per hour (72 km/h), the Greyhound is the fastest breed of dog. In fact, the only land animal faster than the Greyhound is the cheetah.

Standing at an average height of approximately 34 inches (from the withers or shoulder-blade), the Irish Wolfhound is generally considered the world's largest (tallest) dog.

One of the oldest breeds of dogs, Chow Chows are known for their bluish-black tongues and gums.

All modern dogs are generally believed to be descended from Tomarctus, a stealthy predator that roamed the plains and grasslands of North America approximately ten to fifteen million years ago. Wolves, jackals, and coyotes are also believed to be descendants of Tomarctus.

The Dobermann or Dobermann Pinscher was originated in Germany around 1890 by Louis Dobermann, a tax collector who needed a guard dog for protection.