I have a zoo question: What's your favorite kind of enrichment to see in enclosures? At my local zoo when it's super hot they freeze treats in giant blocks of ice and the animals have to break through the ice to get the fruit or meat. I love watching the grizzly's go at it.
Carcass feeds, for any species. I really like seeing the predatory side of animals - somehow for all the emphasis put on zoo animals being wild animals, zoos are often still very disneyfied in their presentation of carnivores. Even the presence of whole prey in an exhibit helps break that trend and remind people that carnivory really does mean eating other cute animals.