Who Pooped in the Zoo? Join us on an exploration of what poop tells us about animal bodies and animal behavior. Poop may be smelly and gross, but poop tells stories. It tells us what an animal has eaten, what age it is, if it is healthy, and if it is male or female. Did you know that the San Diego Zoo’s 4,000 animals produce four to five tons of poop a day?! This full-color, 41-page paperback book was written by Caroline Patterson and the San Diego Zoo with illustrations by Robert Rath. Learn fun facts and share them with your friends!