Cats and cats have been domesticated by humans for 3500 years (but not completely domesticated like dogs). The ancient Egyptians kept cats to catch mice and other rodents and prevent them from eating their own food. Nowadays, cats have become a very widespread pet in families all over the world. In English, male cats are called "Tom" (in cartoon purebred cats, owners will let cats breed what they think is "perfect" (see selective breeding), but because purebred cats are mostly inbreeding, their health is generally worse than that of mixed-race cats. Only 1% cats are pure blood, and the other 99% cats are mixed-race, commonly known as long-haired cats and short-haired cats. Non-thoroughbred cats are called "Moggy" in Britain; They are called "alley-cat" in America, even if they are not wild cats or stray cats (alley means narrow alley in America); It is called "mix" in Taiwan Province Province. There are quite a few kinds of cats, each with its own unique characteristics. Under the selective mating of human beings, cats are divided into long-haired cats and short-haired cats according to their fur types. Tiger-striped cats have many colors and patterns, but this is because of different breeds. They are all the same species, and the most common is the tiger-striped cat. Dogs, usually domestic dogs, commonly known as dogs, are common canine mammals and are close relatives of wolves. Dog is a domestic animal domesticated by human beings not later than 14000 years ago-even earlier than 15000 years ago. Today, there are hundreds of domestic dogs. Chihuahua puppies with a height of only a dozen centimeters to Irish wolfhounds with a height of nearly one meter vary in color from white to black, red, gray or brown. Domestic dogs, like humans, are highly socialized collective predators. This is probably why their overall behavior is trainable, interesting and suitable for human family and social environment. Breed Squirrel Dog Newfoundland Dog Lansier Dog is Bai Wen Great Dane Sha Pigou Bitch Pug Bohemian Chihuahua Dog Song Shiquan Husky Mazz Dog Tibetan Mastiff is bigger than Bear Dog Damading Boeida German Black-backed Pemba Poodle Shepherd Dog Golden Retriever retriever Labrador retriever Cocker Pug Dog Rottweiler boeing da retriever.