Your dog means the world to you and you’d do anything to keep him happy and healthy. So what do you do when you want to provide your dog with the highest quality, compelte and balanced diet? If you’re the people at Castor & Pollux, you work diligently with your Animal Nutritionist, Veterinarian, and ingredient suppliers to develop Natural Ultramix – our complete line of natural food for dogs. If you’re everyone else, you simply buy one of our bags. It’s that easy.