If you question their (shoddy and unprofessional) business practices, you will get the guilt-trippiest sob story you've ever heard.
"This is my business and I run it the way I want and this is a happy place and I don't need this crap and I have to do what I have to do and and and" blahblahblah.
Any other groomer in town would listen carefully to the client's concerns, address them in a positive and polite manner, and take the client's money.
These folks are apparently doing so well that they can pick and choose - if you are a savvy consumer with good business sense and the willingness to ask uncomfortable questions, you will not be welcome here.
Take your dogs elsewhere (Puff & Fluff on 16th street/Bethany Home is very accommodating and SO DAMN NICE) and save yourself the aggravation.