I didn't see it, but how scary! People laugh at me because I worry about taking Jake to the groomer....stories like that are the reason why! I hear so many bad things about various groomers.
I think the best thing to do, if you can, is to go in person and make the appt. That way, you can take a look around and ask questions. My son-in-law recommended a groomer to me that he has used, and he knows a friend of the owner. I was in the area and had Jake with me and decided to stop in and check it out and make an appt. I was really happy with what I saw, so I made an appt. Unfortunately, they had a death in the family and called me to reschedule, and then some other things came up in the meantime with Lily, and I injured my neck/back/shoulder so I haven't been able to make a new appt. yet. But, I do plan to as soon as things calm down a bit around here.
Going in person also allows you to see other dogs during or after grooming. I saw two yorkie brothers there whose names were "Fast" and "Furious" lol. Their owners were just picking them up, and they looked gorgeous and seemed happy!