My cavalier king charles is 5 months (6 actually, just thought about it) and LOVES to play. If i give her a treat she will put it on the ground, pounce on it, run around it like ten times, takes a little bite then plays with it for a hour before eating it. I have been told in a couple of years she will sop. To what degree do they calm down??? Will she always be playful and be really excited in the morning???