OK, I don't want to scare you; but, there have been some pretty horrific grooming incidences at PetSmart, reported right here on YT. IF you go to PetSmart, I'd be sure not to leave your baby, and watch them at all times until they're done.
Here's one in particular that upset me so much I had to call the store! Do a search here, on Petsmart grooming.