It is good to keep animals in zoos. Zoos are places for people to see many different kinds of animals from all over the world. Without zoos, most people would never see a real tiger or bear. Secondly, zoos look after the animals very well. The animals are always given food and cleaned on time. In the wild, it is not always possible for an animal to find food, so sometimes it goes hungry. Thirdly, Zoos protect the animals. They give them safe place to live in. In the wild, some kinds of animals are in danger. If there is no zoos, there would be fewer kinds of animals in the world. However, some people think it is unnatural  and unfair to keep wild animals in cages. Some cages are too small for many animals such as bears and tigers. They always look not happy in cages. Wild animals should look for their own food. Anyone would not feel happy if he isn't allowed  to go outside his home and animals don't like it either. If you go to a zoo, you can see   _
dogs tigers cats mice