I have a little welsh gelding and am having problems finding bit that he is happy with. Started with a tom thumb snaffle, currently using an eggbut French link. He doesn't seem to have a lot of room in his mouth and am thinking that the jointed bits are taking up too much room. He almost constantly grinds his teeth whilst bridled and bares his teeth too. His tongue is constantly pushing the bit around and although it looks as though he gets his tongue over.. he doesn't. Anyone experienced anything similar? and suggestions please?