When Zeus plays with my year-old niece, Sierra, he feels it is his duty to wash her face with his tongue. Sierra loves it, and her mom and I don't mind, but it drives grandma crazy. How do we get him to stop? Sierra loves her "Ooosh" (she can't say Zeus yet, LoL), and gets very upset whenever someone tries to stop the licking or lure him away from her. We tried telling Zeus "no" last time, and Sierra burst into a fit of wailing. Any ideas?