Disadvantages The animals are not free Not in its natural state. Tropical animals, especially those that need to stay in the cold. With their animals too cold to hot countries. To simulate the climate there. It is not natural we did not see the grace of some animals, such as birds, which, if present in nature. It will go anywhere they fly freely in the cage, but it was just a little flying tigers instead of running. Sensational soaring Jones But the pacing was sleeping animals in the zoo, it will gradually lose themselves indefinitely.