The Catit® Design Fresh & Clear Cat Drinking Fountain provides your cat with a continuous indoor source of fresh-tasting, cool, filtered water that will encourage your pet to drink more water. Encouraging your cat to drink more water helps ensure proper kidney function, helping to prevent crystal formation that can lead to urinary diseases. - New elevated design - Multi-Stage Filtration absorbs water impurities (replacement filters available, sold separately) - Large surface area for greater oxygenation - Increased water-to-air surface area adds oxygen for fresher, tastier water. - Re-circulating flow eliminates stale, stagnant water. - Also suitable for small dogs.