I think zoos should be closed because animals may cause death and injuries but they only do that because of pain and hunger. If this carries on, animals will go crazy in the zoos and may start attacking. Animals are chained up and I heard that also some animals are chained trough their noses. They should be left in the wild wit there own relatives. As well as leaving in the wild, they need freedom and happiness. And that thats why I think zoos should be closed unless they are helping and caring the animals and creatures.