I was at our vet yesterday with my other dog, Hannah, for a different issue, but while I was there I raised the problem about Tucker. One thing the vet wanted to know was if the episodes Tucker has had were at the same time of day. Well, I hadn't made a record and couldn't remember. He said there are some situations where a liver problem could cause this and it might relate to when he had eaten. He recommended that we keep track of how often and exactly when each episodes happen. He also said that if there were any more, we should bring Tucker in for evaluation, something we had not done yet since there had only been two and they didn't seem that bad.