OMG! I thought I had the only cat in the world who preferred to drink from a glass! That is Mac's preferred water source. I feed my crew Blue Wilderness Duck for their dry or Blue Indigo Moon dry. Both are grain free and, yes, my cats never need their teeth cleaned! I feed Wellness wet, chicken/herring or turkey/salmon. It's the one grain free wet they will all eat. Oh, they LOVE Blue Indigo Moon Tuna wet, also.