I don't see why it would have had to see tv to do this; boredom would surely be the mother of invention in this case? Just speculating. I had a friend who worked at a zoo. She finally convinced me some of them are quite humane and necessary in that they help to promote rare and dwindling species, even growing their numbers through exchange breedings, etc. I think the best are those which are humongous and in which the people have to be in the cages, i.e. buses/tour vehicles.