[YorkieRose]

I asked people I trusted and who they have used.
For a long time I watched handlers when they had no clue anyone was observing...you learn who loves dogs.

Quite frankly, I would never give a professional constructive critizism..the best knows exactly how to show your dog to it best ability and present it to perfection...if not find another...
There really is nothing you can tell them, good ones know there business..they know when the dog is not showing well and they know how to correct a problem. You do not need to stand on the sidelines and mention your dog dropped it's head or did not look at the judge..your handler is on it.
If you do not like the way it is groomed, again if the handler is a winning Yorkie handler, perhaps you are not grooming correctly...
If a handler consistantly finishes Yorkies in short measure as mine did, I kept my mouth shut..paid the bill and allowed her to call all the shots.

I never signed a contract for a few shows...she also checked me out to see if I was honest and kept my word.