I have 3 cat's. They are always drinking from their Avalon fountain. I have to fill it up twice a day. My cat's are spoiled rotten and lazy. 2 of my cat's are too heavy so they lay on their stomach's to drink. All of my cat's will stop drinking from the fountain if the water reaches below 2 inches from the top, or so it seem's. I do have to agree with one of the other reviewer's, the water pressure from the top is much slower than when I first bought it. Also, for me, the filter's are hard to find locally. Having said that, I would still buy another one if something happened to the one I have now. Over all a nice product for my cat's. >^..^<