@ Snowleopard: Your being a little extreme when you say that Detroit is the only adequate Polar Bear exhibit. San Diego & Toledo both have very adequate exhibits for Polar Bears. There are some others too. That is going a little far when you say that ONLY Detroit has an adequate Polar Bear exhibit.
When you are referring to the Sumatran Tigers what particular zoo are you talking about? I think that Bronx Zoo does an excellent job for displaying Big Cats. Tiger Mountain & Himalayan Highlands are two of the nicest exhibits for big cats and they are the perfect setting for a big cat displaying natural behaviors. Tiger River at the San Diego Zoo is another excellent tiger habitat, so is Utah's Hogle Zoo Asian Highlands. Dallas Zoo has a nice tiger habitat, so does Minnesota Zoo. So there is not a shortage of nice tiger exhibits in the country. There are also plenty more. The big cats that doing bad in captivity are the ones that are living in cages created in the 1950's. I think if any animal is given a modern habitat it will do well.
When you are referring to the Sumatran Tigers what particular zoo are you talking about? I think that Bronx Zoo does an excellent job for displaying Big Cats. Tiger Mountain & Himalayan Highlands are two of the nicest exhibits for big cats and they are the perfect setting for a big cat displaying natural behaviors. Tiger River at the San Diego Zoo is another excellent tiger habitat, so is Utah's Hogle Zoo Asian Highlands. Dallas Zoo has a nice tiger habitat, so does Minnesota Zoo. So there is not a shortage of nice tiger exhibits in the country. There are also plenty more. The big cats that doing bad in captivity are the ones that are living in cages created in the 1950's. I think if any animal is given a modern habitat it will do well.