Beaphar Hamster Vitamin Solution is a highly palatable, easy-to-use liquid vitamin supplement for hamsters, gerbils, and rats. It contains 10 essential vitamins, including B, C, E, and K, to support optimum health and promote a long and active life. Simply add the concentrated solution to your pet's drinking water or food. For hamsters and gerbils, use 15 drops per 50ml of water or 15 drops to food twice weekly. For rats, use 30 drops per 100ml of water or 23 drops to food twice weekly. Please note all measurements are manufacturer stated. This product is ideal for hamsters, gerbils, and rats.