The advantages and disadvantages of having a pet

It is sometimes nice to have a pet. A cat or a dog can be a good friend and that is important for people who do not have a family or many friends. For this reason many old people have a pet. Moreover, children often learn a lot if they have a dog, a cat or a fish, for example. On the other hand, there are of course disadvantages, too. Cats and dogs can be dirty and that can sometimes cause health problems. Furthermore, pets can be expensive: their food costs money and if they are ill you may have to pay a lot too. In short, I think it is important to remember that a pet is not only a friend but also a responsibility.