
Hi Michelle,
I personally do not have any experience or first hand knowledge of epilepsy in westies and as far as I am aware it is not really that common in westies at all or certainly not more common in westies than other breeds. I form this opinion from the westie breeders I have asked approx 20 plus. I am sorry I cannot give more accurate info.
I saw your post and could not immediately answer it so posted the question on one or 2 westie groups I am on, some of the members have 30+ years experience. Not one had personal experience of it with their westies , one did say that it is known for vets to say it is epilepsy when in fact it is not that at all or at least not 100% confirmed. I am however not discrediting your vet if that is what he says and it is always best to go with the assumption he is right.
Fits can be caused by various things such as liver shunt, infections, low blood sugar, thiroid problems, diabetes. The list goes on. For epilepsy to be 100% diagnosed your dog would need to be tested for it.
If you vet is confident that this is what is wrong then if the dog requires medication your vet should prescribe it. If he hasn't then he may feel the dogs doesn't need it. I would personally ask him. Also ask for a bit more details as there is varying degrees of epilepsy. The drug that I believe is used to control Epilepsy is called Phenobarbital. Maybe Pat can confirm this.
Even if it is true that you dog has epilepsy it can be controlled for the rest of the dogs life so I would not overly worry yet. I would advice you to speak to your vet again and raise your concerns. Maybe jot you corncerns on a note pad so you can remember everything you wanted to ask.
Sorry I am not more help. I wish you good luck with your dog.
BFN Pamela