My kitten is having distressing episodes where it's like he can't tolerate his own purr. He opens his mouth, shakes his head and swallows. He is quite disoriented by it and then exhausted. He's been to the vet and the vet is very confused by his symptoms and doesn't know what the problem is. He thinks it must be something very unusual and possibly congenital. The kitten also has periods of being perfectly normal. I'm so worried for him. He's a rescue and only about 8 weeks old. I'd be grateful for any ideas as to what this might be or if anyone has had a similar experience.