Oh Connie...I wish you all the best - it's too bad when a groomer says someone isn't welcome there anymore... but hey - they may need to rethink their bedside manner .....many times it's the GROOMER not the yorkie -
I have a friend who had trouble and when she switched groomers ...that all stopped. I know some dogs really can be terrified ....but I also believe the right person/groomer can help them overcome their fears.
GOOD LUCK

I bet the new groomer has better luck