Hi, my new cob cross seems to have a problem with his bit as he tosses his head up and down with it. He originally had a simple loose ring snaffle and now has a (curved) eggbutt snaffle in case it was the bit pinching but he still seems to do it. I have had his teeth back and saddle checked. He has some sores on the inside of his gums which the vet says are healing but I don't think the bit would affect these areas? He does it when you just put the bridle on before even riding- does anyone have any suggestions? thanks a lot