Bibi and Tina, Everyone Loves Cuddles

Cuddles, a cute little Shetland pony, comes to stay at Martin's Farm for the summer holidays. Before long, everything revolves around her, and the sweet little horse is totally spoiled. But when Knuddel turns up saddled in the middle of the farm one night, Bibi and Tina start to worry. Was someone trying to steal the pony?