I recently perched a now 3 year old off the race track QH mare. Needless to say she is very green and doesnt know to much. We have this problem where she starts shaking her head when being ridden. She'll pop her nose up and down, and throw her head up. And she just recently started throwing it side to side. I'm very light handed and try not to get in her way at all.
I was riding her in a Berry With, like the image below, but the mouthpiece is a twisted wire with a dog bone in the center.
I'm not too fond of it just because it seems a little harsh, so im switching her to a full cheek snaffle with a french link today.
I know its not all the bits fault, and she is green and could have just developed a bad habit. Any advice on how to stop the head shaking?