The Harmony Cascading Stainless Steel Deluxe Pet Fountain filters and refreshes pets' water. The cascading water circulates filtered water which encourages pets to drink. Increased hydration is important to a pets' overall health. Cat's don't instinctively know to drink, by providing moving water, cats are more attracted to the movement and will drink more frequently. The stylish design of the Harmony Cascading Stainless Steel Pet Fountain holds 60 oz of water, which would be suitable for 1-2 cats or small dog.