
Hi Busydoggs, good points and all worth noting ;)
I think the OP has to establish first with the vet if these are likely to be fits. If they are, all fits have a cause - although obviously it's not always possible to determine that.
If idiopathic epilepsy is a problem in the breed, he's reached a classic age for symptoms to appear but I'd want other things ruled out first - particularly over-active dreams :D Also if it were epilepsy, "cluster" type fits tend to be an earlier onset than 5 years - hopefully he's chasing wild boar <LOL> while in the land of nod or failing that it's a reaction to a local trigger which can be removed from his environment.
Hope he's OK, Teri