A horse called Dora

Sam J. Butterbiggins' only ambition is to be a Very Noble Knight, but he has a problem he's been packed off to the castle next door to stay with his aunt, uncle and annoying cousin Prune while his parents are away. But Sam's discovered an ancient scroll listing the six quests to be completed in order to become a knight, and he's already completed the first one! Now he's found his True Companion (Prune), next on the list is to track down a Snow White Steed. But when Aunt Egg orders Sam and Prune to journey to Weasel's Hill to deliver Horace the warthog back to his owner, it looks like the young knight-in-training looks will have to put his quest on hold. Or will he?