Oasis Vita-Drops for Hamsters, Rats, Mice, and Gerbils is a multi-purpose and balanced supplement formulated especially for pocket pets, and contains all known essential vitamins as listed in the latest recommendations of the Committee on Animal Nutrition of the National Research Council. Oasis Vita-Drops can be added to the food or the drinking water (whichever is more appropriate and accepted by the small animal). This premium quality high potency multi-vitamin formula ensures balanced daily nutritional intake. Focus-Formula for small animals. Made in the U.S.A.