With the addition of the Pet Water Fountain to our cat maintenance collection (automatic cat feeder and automatic litter box), cat care is a breeze.  With 2 cats and a curious dog, we have to replenish the water a little shy of one week.  I find when the cats use the fountain there is no mess, however, when the dog does we find water residue on the floor.  It must taste better, because they all prefer it over the traditional water bowl.