The Critter Cruiser is a recurring event first featured in 2011. During the event, a small car with a nursery trailer hitch appears in the zoo parking lot. The event consists of a timed breeding challenge. While the Critter Cruiser is only available for a limited time in the zoo, like all events, the time limit does not start until the player triggers it.
Players are loaned a male / female pair of rare and otherwise exclusive animals and are given a time limit to breed them. When time expires, the animals on loan are taken back. If a player is successful in breeding, they can exchange the babies they've bred for adult animals. Players can purchase additional animals in the Zoo Shop if they wish to make more breeding attempts during the event.