Zoo keepers prepare for a chimp birth, vets investigate a bear's mystery illness and a dangerous antelope is darted on the zoo's grasslands habitat.

At the North Carolina Zoo a gorilla has emergency dental surgery, vets examine a deadly rattlesnake and zoo keepers try to take blood from a lion's tail.

Zookeepers prepare for the birth of a white rhino; two young lions leave the pride; and a pair of cannibalistic snakes go on some risky dates.