Oh, wow, Denyce...that is a scary thing to witness. My RB boy, Bruno, had one when he was around 13 or 14 for the first time in his life. He was getting groomed by a mobile groomer and she brought him into the house wet because the dryer made him have a seizure. I felt so bad for him, he was such a sweet boy, and, I hated that he had felt so scared by the dryer. He pulled through it quickly, though, and, acted like it had never happened. She made a note of it, though, and, the next two times I used the service, they just brought him in wrapped in towels. Poor Sequoia, I hope it's nothing too serious. I'll be thinking of her. I hope the vet can find out what triggered it.