K9 SUPERFUEL™ K9 SuperFuel is not just for athletes. K9 SuperFuel boosts performance, immunity and improves looks, increases muscle power, fights fatigue & neutralizes lactic acid. Great for agility, Frizbee, obedience, tracking, search and rescue, police, schutzhund, fly-ball, ring sport, tracking, herding and hiking. Don't need the extra energy? Try Show Stopper.