Being a trainer myself, I know some of us can be an arrogant and self important. We don't all use the same methods or have the same convictions about certain things.
I suggest simply saying something like this," My Vet says that I should use a harness on my Yorkie to prevent damage to her trachea." You do not have to provide proof or explain why you choose to use a harness. If it really bothers you copy some of our Yorkie Talk articles about CT. And give them to the teacher privately.
I only train toy dogs and puppies and we NEVER use a leash on the collar. Only harnesses are allowed. So see in my class, if you had a large Akita pup maybe my methods would not work for you ! Hope this helps.
__________________ Teresa & Rubin, Gracie, Abba, Ginny Joy and Julia Rose  Act like a dog, be kind, forgiving, and loyal. |