I happen to have been on the recieving end of littered water more often than I care to admit. Mine all love to dip their paws into my drinking glass. ALL of them. So the same splashing Kirin's doing in the water dish is the same my guys do to my water glass.

Let me tell you from personal experience, scented litter tastes the worst!

I have no idea how to get them to stop, but I doubt it would be too harmful, because they do groom themselves and the dust gets all over everything as it is.