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While the brothers are making sure all the habitats are squeaky clean, they discover how much they can learn from the animals themselves, as they are nature's best clean-up crew.
Trying to solve the case of the mystery footprints, the brothers look at the animals' feet. Could it be the penguin chicks, the snow leopard cubs, or something far more peculiar?
The brothers hold a party to welcome some a red panda, two cheetah brothers and some sand lizards to the zoo - but will Cam be able to collect the wriggly lizards?