Hello - I think that you and your vet may have needed to talk in more detail. Some vets (indeed, some people) answer questions on a simple level; they want to get the main points / information across, and acheive the thing that needs to be acheived. You seem to have come out of this consultation having wanted to understand things in more detail than the vet gave you; perhaps what they said didn't tally with your experience / expectations so you want to know why they said it. It may be that you needed to ask them. I don't know enough about your dogs' case to make a judgement, but here are some things I'd be thinking about.....
- Some breeds / families of dog are prone to a genetic / inherited epilepsy. However, if your dogs' breed / age / manner of onset isn't typical, your vet may be wondering about other conditions.
- Fitting can be caused by inflammation or pressure on the brain-cells within the head; there are infinite reasons for this. Low blood sugar can be one, Addisons disease another, the ingestion of toxins another. You may hear the term 'space-occupying-lesion' meaning something that takes up space within the skull. The skull is a closed box, so something added to its interior puts pressure on everything else. These 'somethings' added can be tumours, cysts, fluid, inflammatory cells, bleeds etc. Sometimes a neurological examination gives your vet more information about this.
- In general, good questions for your vet are: What could still be causing these fits? (it may be a long list). Is there anything that you think is particulary likely? What will happen if we go for referral (always ask about cost etc)? What will happen if we don't? How much time delay is involved in this and is there anything we need to do in the meantime?
I hope that something there helps.