Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you today. I do apologize that your question was not answered before.Different experts come online at various times; I just came online, read about your situation, and wanted to help.
Again I do apologize that my colleagues could not aid you sooner. If you would still like assistance, can you tell me:
Does she have any known health issues?
When she has these episodes, does she seem to breathe faster?
Do her gums look pale/white?
Does she ever look like she may faint?
Have you noticed any change in thirst, appetite, weight, or volume of urine she passes?