We live in an area with extremely hard water. Our old house had a water softner (sodium salt based) and we never had any problems, the dogs drank the water just fine... but then that's what we had when we got them. We just hooked up the water softner at our new house (yes, we had it for a year ) and it uses a potassium salt. My dogs have apparently become accustomed to the plain city water and are boycotting their water dishes. Does anyone know of a reason other than taste that they might not be drinking it? I even bought some bottled water and they turned up their noses at that! They are not dehydrating- I guess getting enough from their outside dish (which isn't softnened) and the potty but it worries me. The humans are drinking it and doing fine... I just don't want to poison the dogs by ignorance!