We all know how important pets are to our lives. We don’t have to examine studies by physicians and scientists to know that when we spend time loving our pets we feel better! Pets are loyal and lovable, and offer us unconditional devotion. They bring out our instincts for nurturing; we feel needed and relied upon. Our stress levels decrease, we feel accepted just as we are with no judgments.
There are different reasons why many people have pets; some may argue that pets are annoying if they are in a reduced space, such as an apartment, some others states that they are unconditional and lovely. Who is right?
Those who like pets say that they are as their best friend, even though they cannot speak together. Why people want a pet? I will tell you: because, pets could be a friend, a child, a sister or brother, even they can be a doctor. Animals are such agreeable friends - they ask no questions, they pass no criticisms. (George Eliot)
It is often one of the most valued relationships a person can have. While we as individuals may feel a variety of emotions, pets don’t have mood swings or meltdowns. They allow us to hold, stroke, groom, or just play with them, and are very good listeners! For most pet owners, the relaxation our animals provide us by just being there as our friend, enriches our daily life and allows us to go on with the tasks of living.
I have heard many stories about couples who do not want to have babies, but they have a pet such as a bird, a dog or a cat (along the time, a link is created and the couple see their pet as a person instead as an animal).
On the other hand, animals could be the best doctor for a child with a genetic disease, as it has been said; a complex link could be created between owners and pets, such a miracle link that can a child getting better.
Pets commonly provide their owner physical and emotional benefits. Walking a dog can supply both the human and pet with exercise, fresh air and social interaction. Pets can give companionship to elderly adults who do not have adequate social interaction with their people.
On the contrary, those who do not like pets have irrefutable reasons; transmitting diseases to pregnant women, a number of persons are allergic to some animals, and sometimes getting animals in small places could become in a terrible disaster. But if animals are handled well, all of these problems could be avoid.
The keeping of animals as pets can cause concerns with regard to animal right and welfare.  Pets have commonly been considered private property, owned by individual persons. However many legal protection have existed (historically and today) with the intention of safeguarding pets ‘(and other animals’) well-being. 
The most popular pets are likely dogs and cats. But people also keep house rabbits, ferrets; rodents such as gerbils, hamsters, chinchillas, fancy rats, and guinea pigs; avian pets, such as canaries, parakeets and parrots; reptiles pets, such as turtles, lizard and snakes; aquatic pets, such as tropical fish and frogs; and arthropod pets, such as tarantulas and hermit crabs. there are approximately 78.2 million pet dogs in the United States, approximately 86.4 million pet cats in the