The Ragbag makes series of animal cards — similar to baseball cards, except they feature words related to the animals:
i have long been infatuated with the many specific terms applied to animals. it is only the frog who croaks and only the donkey that brays. deer travel in a herd, fish a school, wolves [...]
The News & Observer reports on a recent symposium at North Carolina State University dealing with overweight zoo animals:
Gorillas in the wild live on a bulky, low-calorie diet of such things as leaves, shoots and bark, but in zoos are often fed specially formulated biscuits.
The biscuits offer nutrition, but aren't bulky and don't fill up [...]