Animals should not be kept in cages?

They should not be kept in cages. Imagine yourself sitting in a cage, having people watch you from afar. All you eat is stale food, but you know that if you do not eat it you will die. The average lifespan of an elephant is 50-70 years, but a zoo elephant is 16-18 years. Birds were born to fly, not have their wings clipped just to have themselves watched and stared at everyday. Two polar bears seen by a visitor were pulled away from their families and forced to breed, and the visitor said that the polar bears were very dull. If we are free, they deserve to be free.