Okay so I recently started working at a new barn, and there's this horse there that is about 9, some kind of warmblood breed, and he's a bit goofy. His owner used to event him at prelim level, but he randomly changed (this was all before I got there). The vet and owners think he had some sort of stroke, because his personality is completely different, but he's still rideable, the major thing though is that he doesn't keep his tongue in his mouth; It just kind of flops out the side. This isn't a huge problem, but his owner no longer events him (or even rides him) because he got terrible dressage scores for being "disobedient with his tongue".
Has anyone else has this issue? Are there even any solutions? I've attached a picture so you guys can see how goofy he really looks