[anonymous]

Excellent!
However, the suggestions that your regular vet made regarding starting Prozac and taking an ultrasound to rule out neurological anomalies (or whatever he is looking for) made sense too.

Your dog is a senior, vulnerable to all kinds of things, and his age may be a factor as to how aggressive you want to be with treatment (discuss options with the vet)
Make a list of questions for the vet.

When your dog has one of these episodes, see if you can capture it on video to show the vet.