Guinea-pigs in the Greenhouse

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?