Mammals.
All lot of different kinds of mammals are kept as pets. They are some of the most popular pets in the world!
Here are some the most common pet mammals
Dogs
People have been keeping dogs as pets for over 15,000 years! And they are great pets!
There are many breeds of dogs that are considered kid friendly. Breeds like Pugs, Poodles, Irish Setters, Viszlas, Newfoundlands, some Bull Terriers, and Mastiffs are all considered good dogs for kids. Remember that each dog has its own personality and just because a breed is said to be good with kids it doesn't mean that the individual dog will be.
If you want to know which breed of dog is right for you check out this site:
Cats
Cats have been kept as pets for over 8,000 years. They are also right at the top of great pets to have.
Domestic cats have been selected by humans to display a wide array of body shapes and colors, from hairless forms to long-haired Persians and tail-less Manx cats to very large Maine coon cats. Colors range from black through white, with mixtures of reds, yellows, and browns also occurring.
Some great cat links:
animals.nationalgeographic.com
Rabbits
They can be trained to use a litter box, they’ll come when called, and some will engage their owners in a daily game of tag! Domestic rabbits are delightful companion animals. They are inquisitive, intelligent, sociable and affectionate—and if well-cared for, indoor rabbits can live for seven to ten or more years.
There’s a lot of variety among domestic rabbits. The more than 60 breeds include the Dutch, who’s very popular in the United States, droopy eared German lops and furry Cashmeres. Rabbits range in size from teeny two-pounders to the 13-pound Flemish Giant.
You can learn more about keeping rabbits as pet here:
Rats & Mice
Domesticated rats and mice make excellent pets for children and adults alike. They are highly intelligent (being the most used in studies for intelligence and psychology research), clean, and very sociable. They interact with their owners the same as dogs and cats do and may be easily trained. Although rodents are nocturnal (sleeping during the day and active at night), rats will quickly learn to adjust their schedule and be ready to come out and play when you get home from school or work. They also do not make any noise nor need to be walked every day (although they love to go out with you when you visit friends!). Watching mice play can be a lot of fun.
The American Fancy Rat and Mouse Association
Hamsters
There are numerous varieties of hamsters, however the one most often kept for a family pet will be the adorable Syrian hamster. Syrian hamsters include the biggest type of hamster, and in addition they are available in lots of diverse colors. They are also available in long-haired and short-haired varieties. The long-haired Syrian hamster is oftentimes referred to as a Teddy Bear hamster.
Gerbils
Gerbils are native to many parts of the world, but the type of gerbil commonly kept as a pet is the Mongolian. These busy little rodents generally grow to about four inches, with a tail of the same length. Pet gerbils are available in a variety of colors, although they usually have white fur on their bellies. If well cared for, gerbils usually live for three to four years. These gentle critters are hearty and seldom bite. And unlike hamsters, Mongolian gerbils are active during the day.
Guinea Pigs
Larger than hamsters, but smaller than rabbits, guinea pigs can weigh a couple of pounds and generally live for five to seven years. The three most common breeds of guinea pig are the Smooth-Coated, with short, glossy fur; the Abyssinian, whose hair grows in fluffy tufts all over the body, and the Peruvian, with long, silky hair that flows to the ground.
Guinea pigs make wonderful companions. These docile members of the rodent family rarely bite and are known for squeaking with delight when their favorite humans enter the room.