I have the same situation going on here. Scarlett is FULL of energy...she plays and plays, lots of fetch and tug-of-war going on here. She is smart and lively and I love it! We have a 12 year old Golden here that she wrestles with, and that does help some. She will be spayed within the next couple of months, she is 6 months old now. I would LOVE to get her a sister but there aren't many yorkies where I live, we will see what happens....