From Wild Animals to Pets: The Evolution of Man's Best Friend

Did you know that in the United States, there is one dog for every three people? Dogs not only make great pets, they are also very unique.

Dogs have many different shapes, sizes, and colors. For example, Chihuahuas only weigh six pounds. Other dogs, such as Saint Bernards and Newfoundlands, can weigh over 100 pounds or as much as grown human. Those are big dogs!

Furthermore, dogs' coats can be many colors. Some dogs have brown coats, whereas others are yellow, white, or black.

Dogs also have many traits. Those traits can come from manmade choices such as selective breeding. Selective breeding is when dogs are put together to make pups with special skills. Some skills can include guarding, herding, hunting, and retrieving objects on land and in the sea. All dogs, even different breeds, have a good sense of smell, but some have a better snout.

All dogs come from wolves. Dogs still behave like their ancestors in many ways. One way this happens is by leaving scent marks of urine on trees and other objects like wolves do. Although dogs are different from each other in many ways, they truly are man's best friend.

[Source: Encyclopedia of Animals ]