Check the chest next to the ocelot cage in the Tutorial level to find 10 bones. Find some wolves (I usually found them outside the castle walls), and when you do save your game. Go up to the wolf and hit L2 to tame it with the bones. This may take a few tries. You'll see hearts above them when they become tame. Exit without saving and reload the file. Repeat this process 4 more times and you'll get the trophy.