I donīt have the time to read through all those post in this great thread!
But one question: If she is going fine bitless why do want to go back to the trouble riding her with a bit?
I have a connemara pony that had problems with the bit. She was pulling, shaking her head,....riding was not much fun.
I had her teeth checked by a vet and he floated her teeth. Not much improvement. I started riding her with a bitless bridle and subsequently with a LG-Bridle.(LG Bridle™
). It was like riding a new horse! No more problems since I would never bother putting a bit back into her mouth!
Last summer I eventually found out what the problem is: I had an equine dentist check her teeth. She said straight away that she has an old root that has grown onto another tooth. This has obviously caused her pain with the bit.
Lesson No 1 I learned from it: There is always a reason for their behavior. Usually it is pain or discomfort. Sometimes it is difficult to find out what is cause is. But there is a problem somewhere!
Lesson No 2:use an equine dentist and not a vet to have the teeth checked!