Its a trouble thing for the zoo to move to another place. However， as the city is expanding today， zoos in the city are gradually surrounded by high buildings. The animals in the zoo need a quiet living space， therefore the zoos have to move to other places. Its not trouble to move for some small animals， but for the big ones， its not easy.

The elephants cage ：

the base plate

is very important.

The elephant is a giant on the land. You cant drive it to the road as to the sheep. If the elephant is frightened， it will be dangerous as a tank. So the zoo has to make cages to communicate the elephants. The cages are made of thick coating steel pipes to guarantee the cages steadiness. Thick wooden plates are nailed on the plates. It weighs several tons of the cage. Considering the elephant is naughty， and its hobby of standing with one leg， the steel plate is fitted under the wooden plate， in case the wood is stepped broken. There is also a check lever at the gate， which will stop the elephant from retreating， and the workers can close the gate easily.

The giraffes cage：

its not my fault to grow tall

The giraffe is famous for its height. Its cage consists of the cage body and the cage head. The body is fixed while the head can be adjusted higher and lower. This design is convenient for adjusting the height as passing the culverts and the viaducts， in case the giraffe is stuck.

The hippos cage：

care for the teeth

Hippo is another giant next to the elephant in the zoo. The hippos cage is also made of thick coating steel pipes. The cage is 4 meters in length， 1.5 meters in height and width. Hippos are strong and like to bump， so theres also check lever at the gate， a wooden plate is installed on the head of the cage to prevent the hippos teeth from being hurt as the crane is lifting the cage. Their teeth and lower jaw are fragile and easily get hurt.

Dont be hurry to move home

In order to move the elephant， hippo and giraffe were into the cage successfully， the workers should take time to make them adaptively. The feeders should firstly move them to the outer rooms of their homes， and put food into the cages， so the animals go in and eat food， form a habit of eating in the cages. As the zoo will move formally， the workers can push them into the cages only with food， then they put the check lever down and begin to move successfully.