I too wondered how familiar she is with yorkies, I don't think she is very used to grooming puppies/young dogs either. I was a bit shocked when she mentioned the muzzle because she admitted herself that Pebbles behaviour is just puppy biting, not in anyways aggressive. I think the only reason she mentioned muzzling her is so she could get on with the job and get her work done faster. Each day that goes by I can see that Pebbles is becoming more tolerant of grooming, I think patience is required and I don't think the groomer has the patience to deal with a puppy. Pebbles is a very sweet, affectionate little dog, she loves meeting people and other dogs and animals and gives puppy kisses to everyone. She even gave puppy kisses to the groomer at the end of the session and tried to play with her. She's so forgiving! Pebbles isn't in any way vicious so I don't want her muzzled, that might be traumatic for her.
My gut feeling was not to go back but as I'm so inexperienced with groomers I wasn't sure if this was normal procedure and should expect the same treatment at every groomers. Which is why I thought I would ask here.
I will be looking for another groomer and in the meantime I will trim the hair around Pebbles face as needed. She doesn't need a full groom for a while yet, the hair on her face needs a bit of a trim but the hair on the rest of her body is growing quite slowly. There aren't many groomers to choose from where I live so if I don't find a suitable one I'll just have to learn how to cut Pebbles hair myself!
Thank you all for your responses, you have been such a great help