I need recommedations for what wheel to get for the hedgie I'll be picking up in a few days. I've heard a lot about bucket wheels, but I can't find any that are larger than 11". I've also heard a lot about the Exotic Nutrition Silent Runner Wheel, but am concerned about head injuries if the hedgie sticks it's head out of one of the holes while running. Are there any other wheels that I should know about? Or anyone could recommend 1 of the wheels I mentioned?