April is right. You don't list age or anything else specific so I can only give you a general answer, but seizures should be checked out. There's a number of things that can be causing them.
We used to have a Malamute that started having seizures. We found out she had epilepsy and needed to be on medication to control the seizures. I think you're going to have to bring Fluffy in and have her seen to determine what exactly is going on and the best treatment for her. Best wishes.