The second, disadvantages of keeping animals in the zoos. The animals are forced to live in a unnatural habitat. There is not enough living space in the zoos, when often makes animals unhappy and restless. It is also true that, some animals do not proliferate in zoos. Secondly, animals should live in freedom, because it is their natural habitat. Moreover, animals in the zoos live under stress. The worst thing is that animals in the zoos will never be able to exist in their natural habitat alone. (n.d.). Retrieved March 9, 2015). So, some animals require elements from natural