Petco review: Dog groomer

I visited your west mifflin store in PA and I have to say that what I saw the groomer do disturbed me and made me very upset. She was grooming a tiny [censored]zu looking dog and I saw her tug on the chain it was attached to. I continued to watch and the poor thing was shaking and not cooperation up to her standards I guess, so she grabbed the poor thing by the face like you would a child when getting them to look at you. She said something to the dog but I could not hear because they were behind the glass, but the way I saw it seemed to me she was being a little rough with the poor thing. Being that I can't for sure say what she said I feel it is my duty as an animal lover that I bring it to your attention so that another person does not witness this also. The next person may not contact you and contact the aspca instead.
Thank you,
Concerned animal lover