1. Cat

The cat (Felis catus) is a domestic species of small carnivorous mammal.
The cat is similar in anatomy to the other felid species: it has a strong flexible body, quick reflexes, sharp teeth and retractable claws adapted to killing small prey.
A predator that is most active at dawn and dusk (crepuscular), the cat is a solitary hunter but a social species.
Like all felids, domestic cats are characterized by supple low-slung bodies, finely molded heads, long tails that aid in balance, and specialized teeth and claws that adapt them admirably to a life of active hunting.

2.Dog

The dog or domestic dog, (Canis familiaris^[ or Canis lupus familiaris) is a domesticated descendant of the wolf which is characterized by an upturning tail.
The dog has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes.
The dog is one of the two most ubiquitous and most popular domestic animals in the world (the cat is the other).
The dog evolved from the gray wolf into more than 400 distinct breeds.
The dog has been selectively bred over millennia for various behaviors, sensory capabilities, and physical attributes. Dog breeds vary widely in shape, size, and color.

Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits.
The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period.
Most fish are ectothermic ("cold-blooded"), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature.
Fish are abundant in most bodies of water.

The horse has evolved over the past 45 to 55 million years from a small multi-toed creature, Eohippus, into the large, single-toed animal of today.
Female horses, called mares, carry their young for approximately 11 months, and a young horse, called a foal, can stand and run shortly following birth.
Before the advent of mechanized vehicles, the horse was widely used as a draft animal, and riding on horseback was one of the chief means of transportation.

Hamsters are the most common first pet for children.
The best-known species of hamster is the golden or Syrian hamster (Mesocricetus auratus), which is the type most commonly kept as pets.
Hamsters are more crepuscular than nocturnal and, in the wild, remain underground during the day to avoid being caught by predators.
Hamsters are more crepuscular than nocturnal and, in the wild, remain underground during the day to avoid being caught by predators.

Jackrabbits, for instance, are actually hares, whereas the rockhares and the hispid hare are rabbits.
Rabbits are a very popular starter pet for families.
Rabbits, also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (along with the hare) of the order Lagomorpha (along with the pika).
Besides these requirements though, rabbits can be left to their own devices, so make for great starter pets.

Birds are beautiful, majestic and delightful creatures
There are about ten thousand living species, more than half of which are passerine, or "perching" birds.
We’d recommend you take a look at budgies or canaries, as well as some smaller breeds of parrots.
Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming.

Rats are often considered unclean and even sometimes plain scary, but they are actually incredible as pets for kids.
Rats are typically distinguished from mice by their size.
A good diet and keeping on eye on their health are also key.

This pet may end up becoming the oldest member of your family, and also the wisest.
Turtle shells are made mostly of bone; the upper part is the domed carapace, while the underside is the flatter plastron or belly-plate.
Turtles have appeared in myths and folktales around the world.

Goats have been used for milk, meat, fur, and skins across much of the world.
The domestic goat or simply goat (Capra hircus) is a domesticated species of goat-antelope typically kept as livestock.
Milk from goats is often turned into goat cheese.