Vandals have struck at Woodbridge Farm Park and several animals have escaped. Mandy and James help track most of them down, but where is Chocky the pregnant guinea-pig? In the hot sun, she's in danger of getting heatstroke - and Mandy's especially worried when she hears Chocky's babies are due any day! Can she and James find Chocky in time? Another exciting Animal Ark adventure, from the bestselling series.