We switched to bottled water here at my abode just recently (I think it's a scam, here in Vancouver the tap water is awesome, however that's another debate) and my GF puts both cats on bottled water immediately. One cat started throwing up four or five times a day right about then. The cat seemed normal enough otherwise, it's eating, not loosing weight that I can tell, ( to put it on the scales you'd need a handful of Valium and ten yards of saran wrap to wrap it in) so I started with the water as a possible problem putting kitty back on tap water. So far so good, no puking for a couple of days...Could it be that simple? Have I hit the mark first shot? Anyone know anything about this?