Glad to hear your dog is getting better. Thank you for describing the chain of events, I'm sure that isn't easy. My wife and I observed my old dog with very similar behavior last week. It came out of now where and she acted like this for approximately 30 min, I was getting call the vet and she snapped out of it. If this happens again I'll get her to the vet asap and can let him know what to possibly look for. Again, thank you.