High fiber, daily support for your best friend! Natural Science Multi-Vitamin is a hay-based, high-fiber supplement containing essential vitamins to support all of your pet’s body systems. It is also a beneficial source of essential Omega 3 and 6 fatty acids. Size: 4.2 oz. Good For: Chinchillas, Gerbils, Hamsters, Guinea Pigs, Mice, Rabbits, Rats.