Hmmm, darned if that doesn't sound like how my Boo was when he was first diagnosed w/thyroid problems. Of course, Boo is much older, he's nearly 19 now but the way you described Allie's appearance and behavior, it sounded like how Boo behaved. Whatever it is, I do hope that your vet can get to the bottom of it quickly and that a solution is found just as quickly. Prayers are going up for Allie, you and your son. Keep the faythe.