Keeping a pet has become very popular nowadays. This not only brings us lots of fun, but also may cause some problems.

Raising a pet makes our life more colorful for two reasons. First, pets are good companions. When you feel upset, they will stay with you and listen to you. Moreover, they never complain about anything since they can't talk. Next, pets are so clever that they can be trained to help people. For example, dogs are loyal guards, cats are good at catching mice, and pigeons can deliver letters for us.

On the other hand, raising a pet can also cause some troubles. First of all, it takes a lot of time to take care of pets. You should take them for a walk outside and give them a shower every day. If they are ill, you have to take them to a veterinarian's. Second, when your pets are lost or dead, you'll be very depressed. It feels like losing one of your best friends. Third, pets usually have some kind of bacteria. If you are bitten by a pet, you might become infected. Last, many pets become homeless since their hosts begin to tire of them. In fact, some people keep a pet as a consequence of fashion. When they loose their interests and patience, they dispose of their pets easily. As a result, more and more pets are wandering in the street and even have become a threat to peoples' security.

However, although keeping a pet has some disadvantages, people still like to have such company. If you spend enough time looking after your pets, you will also enjoy the happiness they can bring to you.