We just had a scare with our little girl. She has also done this very strange sound (our vet said maybe reverse sneezing) but she does it more when she pulls hard on her leash. However, she did it during the night Friday night. Tonight, she started walking very strangely, as if she didn't have good control of her legs. Then she started shaking when my husband picked her up. Last year we took her to the emergency vet with similar symptoms but she had also vomited. He thought that she may have had a seizure then, but he didn't see it as she was over it by the time we got there. This episode lasted less than five minutes. I can't believe how much we worry about these little darlings.