so sorry to hear about Betty Boop! I hope she is feeling better soon!!
I went through a similar episode with Meiah...they ran every test imaginable and never did figure it out. She has never had it happen again so we don't know what really caused her to go into shock. She is fine now TG!! I hope they can give you some answers so you at least know what to watch for. That is the frustrating part is the not knowing what happened so you can prevent it again.
Sending puppy prayers for little BB!!