Developed by a veterinarian, this fountain prompts pets to drink more often, thereby reducing the risk of urinary tract infection and kidney disease. A continuously circulating stream of water falls from the spout and into the bowl, attracting dogs and cats with the sound of trickling water and enticing them to drink by triggering their instinctual preference for flowing water. The falling stream is naturally aerated with oxygen, ensuring a perpetually fresh drink for your pet. A pre-filter captures large particulates like pet hair, and a three-stage charcoal filter removes impurities responsible for unpleasant tastes and odors in water. A window in the reservoir allows you to easily determine when to add more water.