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Dog facts for kids

Kids Encyclopedia Facts
(Redirected from Dogs)
Domestic dog
Nine different breeds of dogs.
Conservation status
Scientific classification
Kingdom: Animalia
Class: Mammalia
Order: Carnivora
Family: Canidae
Genus: Canis
Species: C. lupus
Subspecies: C. l. familiaris
Siberian Husky pho
Siberian Huskies are pack animals that still enjoy some human companionship

Dogs (Canis lupus familiaris) are domesticated mammals, not natural wild animals. They were originally bred from wolves. They have been bred by humans for a long time, and probably were the first animals ever to be domesticated.

Today, some dogs are used as pets, others are used to help humans do their work. They are a popular pet because they are usually playful, friendly, and listen to humans. Thirty million dogs in the United States are registered as pets. Dogs eat both meat and vegetables, often mixed together and sold in stores as dog food. Dogs often have jobs, including as police dogs, army dogs, assistance dogs, fire dogs, messenger dogs, hunting dogs, herding dogs, or rescue dogs.

They are sometimes called "canines" from the Latin word for dog - canis. Sometimes people also use "dog" to describe other canids, such as wolves. A baby dog is called a pup or puppy. A dog is called a puppy until it is about one year old.

Dogs are sometimes referred to as "man's best friend" because they are kept as domestic pets and are usually loyal and like being around humans.

Appearance and behaviour

Dogs have four legs and make a "bark," "woof," or "arf" sound. Dogs often chase cats, and most dogs will fetch a ball or stick.

Dogs can smell and hear better than humans, but cannot see well in color because they are color blind. Due to the anatomy of the eye, dogs can see better in dim light than humans. They also have a wider field of vision.

Like wolves, wild dogs travel in groups called packs. Packs of dogs are ordered by rank, and dogs with low rank will submit to other dogs with higher rank. The highest ranked dog is called the alpha male. A dog in a group helps and cares for others. Domesticated dogs often view their owner as the alpha male.


Different dog breeds have different lifespans. In general, smaller dogs live longer than bigger ones. The size and the breed of the dog change how long the dog lives, on average. Breeds such as the Dachshund usually live for fifteen years, Chihuahuas can reach age twenty. The Great Dane, on the other hand has an average lifespan of six to eight years; some Great Danes have lived for ten years.

Origin of dogs

Dog morphological variation
Montage showing the morphological variation of the dog.

All dogs are descended from wolves, by domestication and artificial selection. This is known because DNA genome analysis has been done to discover this. They have been bred by humans.

The earliest known fossil of a domestic dog is from 31,700 years ago in Belgium. Dogs have lived with people for at least 30,000 years. In 2013, a study was published that showed that the skull and teeth of a canid, dated to 33,000 years ago, had characteristics closer to a dog than to a wolf, and the authors conclude that "this specimen may represent a dog in the very early stages of domestication, i.e. an “incipient” dog." The researchers go on to suggest that it was, however, a line that did not lead to modern dogs. Genetically, this material is closer to that of a modern dog than to that of a wolf.

Other signs of domestication are that sometimes, dogs were buried together with humans. Evidence of this is a tomb in Bonn, where a man of about 50 years of age, a woman of about 25 years of age, the remains of a dog, plus other artifacts were found. Radiocarbon dating showed that the human bones were between 13.300 and 14.000 years old.

Dogs and humans

Dogs are often called "man's best friend" because they fit in with human life. Dogs can serve people in many ways. For example, there are guard dogs, hunting dogs, herding dogs, guide dogs for blind people, and police dogs. There are also dogs that are trained to smell for diseases in the human body or to find bombs or illegal drugs. These dogs sometimes help police in airports or other areas. Sniffer dogs (usually beagles) are sometimes trained for this job. Dogs have even been sent by Russians into outer space, a few years before any human being. The first dog sent up was named Laika, but she died within a few hours.

As pets

Boy and his dog
Boy holding his pet Jack Russell Terrier
Family pet
A British Bulldog relaxes at a park

It is estimated that three-quarters of the world's dog population lives in the developing world as feral, village, or community dogs, with pet dogs uncommon.

Pet dog populations grew significantly after World War II. In the 1950s and 1960s, dogs were kept outside more often than they tend to be today and were still primarily functional, acting as a guard, children's playmate, or walking companion.

The majority of contemporary dog owners describe their pet as part of the family.

It is estimated there are 77.5 million people with pet dogs in the United States.

The latest study using magnetic resonance imaging (MRI) comparing humans and dogs showed that dogs have the same response to voices and use the same parts of the brain as humans do. This gives dogs the ability to recognize emotional human sounds, making them friendly social pets to humans.

Best dogs for kids

Cason with Rosie
Little boy with his pet dog

The best dogs for kids are ones that have calm personalities and happy to socialize with everyone in the family.

Having a family dog can also teach children cooperation and responsibility, for example helping with chores such as walking the dog, feeding, brushing etc.

Here are some of the most popular dog breeds for kids:

  1. Cavalier King Charles Spaniel
  2. Cavoodle
  3. Cockapoo
  4. Labrador Retriever
  5. Schnauzer
  6. Pug
  7. Golden Retriever
  8. Bulldog
  9. Poodle
  10. Beagle

10 Interesting facts about dogs

Weisse welpen
White newborn Dalmatian puppies without spots. They will get their spots 3 to 4 weeks after they are born
  1. There are hundreds of different breeds of dogs, and around 400 million dogs in the world.
  2. The dog has earned the nickname “man’s best friend”.
  3. The largest breed of dog in the world is the Irish wolfhound. The smallest dog breed is the Chihuahua (dog).
  4. The oldest dog who ever lived was a cattle dog from Australia called Bluey who lived to be 29 years and 5 months old.
  5. A dog’s nose print is unique, and similar to human fingerprints that no two are the same.
  6. Dalmatian puppies are born completely white and develop their spots as they grow.
  7. Dogs dream just like humans do.
  8. Little dogs are often called toy dogs, or lap dogs – because they’re so little they look like a toy and can easily fit on your lap.
  9. A dog is as smart as a 2 years old baby and can recognize around 150 words and gestures.
  10. Dogs cannot eat raisins, grapes, onion, chocolate or garlic because it makes them very sick.

Dog breeds

Big and little dog 1
Dogs are bred into very different breeds: here a Great Dane and a small Chihuahua.
See also List of dog breeds.

There are at least 800 breeds (kinds) of dogs. Dogs whose parents were the same breed will also be that breed: these dogs are called purebred or pure pedigree dogs. Dogs with parents from different breeds no longer belong to one breed: they are called mutts, mixed-breed dogs, hybrids, or mongrels. Some of the most popular breeds are sheepdogs, collies, poodles and retrievers. It is becoming popular to breed together two different breeds of dogs and call the new dog's breed a name that is a mixture of the parents' breeds' two names. A puppy with a poodle and a pomeranian as parents might be called a Pomapoo. These kinds of dogs, instead of being called mutts, are known as designer dog breeds. These dogs are normally used for prize shows and designer shows. They can be guide dogs.

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