Horse very mouthy on bit... any ideas?
Posting this for a friend- he has had his horse ( who is about 5 or 6 I believe) only since spring. Has always ridden him with a hackamore ( his previous horse liked it, so he just kept it up with the new horse...) THe last few days Gunner has been tipping his chin till he could get the bar at the bottom of the hackamore into his mouth, chewing on it and tossing his head. It almost reminds me of a toddler teething... just chewing and chewing. He has also been more wound up than usual. His owner tried a bit, and while the horse is more controllable on a bit, he chews and chews on it... trying to pull the sides into his mouth as well. Not just kind of mouthing it... he chomps and chomps on it. ( I am not sure what kind of bit the owner tried but probably a snaffle- nothing fancy) ANy ideas?