The Dog is a mammal domesticate animal. Dogs can contact their owners. The dog has high sniffing power so the dog sniffs and reaches its owner. Humans can communicate with dogs through a variety of methods. The Dog lifespan is 10 – 13 years. The Dog gestation period is 58 – 68 days. The Dog height is 15 – 110 cm. The Dog is daily sleep for 12 – 14 hours. The running speed of the German shepherd is 48 km/h. The greyhound running speed is 72 km/h. Dog has 4 legs because he races at great speed. Physically the dog has 2 legs and 2 arms. The dog has 2 ears. Because he can hear the sound in his ear.

The Yorkshire terrier dog is the smallest. The Yorkshire terrier length is 9.5 cm and the mass is 113 grams. Saint Bernard is a very weight dog. The Saint Bernard mass is 167.6 kg and length is 250 cm. the Great Dane is the tallest dog. The Great Dane length is 106.7 cm. the mixed-breed dog is lived for 1.2 years. The dog is a pet animal. The Dog has four legs, two eyes, two big ears, sharp long teeth, and a long tail. The dogs have good smelling power so police use dogs to trace thieves and criminals. The Dogs are generally brown, black, and red in color.

Kingdom - Animalia
Phylum - Chordata
Class - Mammalia
Order - carnivore

Family - Canidae
Subfamily - Caninae
Genus - Canis
Species - C. lupus
Subspecies - C. I. familiaris