Thank you. I did actually e-mail an article with the neurologist recommendations to the trainer as I really don't want her to think I'm simply being stubborn.
I will take this as a lesson to find out the training philosophy prior to signing up for a training course. I realize that training with a harness may be a bit more difficult but CKCS love to please so I think that might balance it out a bit.
What should I be looking for in a harness? I currently have a Holt for both dogs and it seems to work well but being just nylon cord I'm a bit worried about chafing. Max hated the flat nylon buckle one I had - probably had something to do with managing to pinch a squirming puppy every time I tried to buckle it.