We just purchased the Drinkwell Fountain for our babies Birthday gift. At first they got a kick out of watching the water & sticking their paws in it. But now they just look at it. How long did it take for your cat to drink out of it? Or how did you introduce it to your cat? Did we introduce it wrong to Max & Sarah? My husband seems to think they'll use it when they are thirsty. Should we just turn off the waterfall effect & let them drink that way?