Dogs have formed such a strong bond as pets, workers and companions to humans that they have earned the nickname "man's best friend".
Humans help train various dog breeds to enter in competitions such as breed shows, agility and obedience contests, racing and sled pulling.
Dog have superior hearing than humans, capable of hearing sounds at four times the distance.
Dogs have a remarkable sense of smell, they are capable of differentiating odors in concentrations nearly 100 million times lower than humans can.
The average life span for a dog is around 10 to 14 years.
Those involved in dog breeding refer to males as ‘dogs’, females as ‘bitches’, dogs younger than a year old as ‘puppies’ and a group of offspring as a ‘litter’.
Domestic dogs are omnivores, they feed on a variety of foods including grains, vegetables and meats.