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Seizure disorders like epilepsy are very common in this breed. If your vet decides that this is the cause, he will get him started on an anti-seizure medication like phenobarb. It's not very expensive and it works well.
If you can catch the behavior on video tape, that would be great. Then you can show it to the vet and they will have a definitive idea of what's going on.
If she is having multiple seizures, you really need to see the vet tonight.
Let me know if you still have questions.