Complex sentence: The Poppers unexpectedly come into possession of a penguin then got a penguin from the zoo who mates with the first penguin to have 10 baby penguins and something must be done before they eat the Poppers out of house and home.
Split into simpler sentences: The Poppers unexpectedly come into possession of a penguin, then get a penguin from the zoo who mates with the first penguin to have 10 baby penguins. Before long, something must be done before they eat the Poppers out of house and home.