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Physical Description

Domestic dogs come in a bewildering variety of shapes and sizes. They have been selectively bred for thousands of years for various behaviors, sensory capabilities, and physical attributes. Domestic dogs have been bred throughout most of their history to be one of a kind of working dog, including dogs bred for herding livestock, different kinds of hunting (pointers, hounds, etc.), catching rats (small terriers), guarding humans (mastiffs, chows), helping fishermen with nets (Newfoundlands, poodles), pulling loads (huskies, St. Bernard's), guarding carriages and horsemen (dalmations), and as companion dogs. Some kinds were even bred simply as lap warmers (Pekinese). Their basic physical make-up though, no matter how modified, is that of their wild ancestors, Canis lupus. In other words, all domestic dogs, from miniature chihuahuas to German sheperds to St. Bernard's have the same traits, they are just different sizes and shapes.

Other Physical Features: endothermic ; homoiothermic; bilateral symmetry ; polymorphic

Sexual Dimorphism: male larger


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Source: BioKIDS Critter Catalog


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