It could be the sudden movements to the play fighting or any loud noises that she might hear. It is scaring her. I htink that yorkies can get really nervous easily. I know my Suzi can. They are very sensitive to new things and change. My Suzi goes nuts it the electricity goes off or the fire alarm beeps.
__________________  "No matter how little money & how few possessions, you own, having a dog makes you rich."  |