[PennysMum]

Make sure they don't intend for you to use choke collars / slip collars for training. That probably should seem like a no-brainer, but it really surprised me when I was shopping around for trainers how many just didn't buy that yanking on a yorkie's neck with a choke collar could damage their trachea.

Outside of that, I'd just look for someone who uses positive reinforcement and is open to uncovering what motivates your dog in particular. The trainer I wound up going to with Penny recognized immediately that Pen is food-oriented. There was a little terrier-mix in the same class who hardly cared for food, but loved squeaky toys. She would use food for Penny, but for the other dog, she used a squeaky toy. I thought it was a great thing that she picked up right away on what really motivated each of the dogs.