Oliver the excavator was assigned to demolish the main building with a wrecking ball, but the walls were so sturdy that it didn't get knocked over until Ned accidentally backed up and collided with the main chimney, causing it to fall onto the building. Oliver was later assigned to demolish another building using his scissor claw, but Alfie stopped him when he heard meowing coming from inside. A stray mother cat and her litter of kittens were inside, and Alfie went in and rescued them from the collapsing wall.