Ooh, you're in for lots of trouble soon Higgin's Mom!
When Princess and Higgins get together, do they play REALLY HARD with each other, to the point of exhaustion? Then nap together? Yoda was playing with a poodle a few weeks ago, and they ran around the house playing for hours! Needless to say, they were rather tired afterwards and they each gulped up trayfulls of water.