I've been giving evening primrose oil capsules to my dogs for many years. However, recently when visiting the vet and mentioning this, she said not to give them as it could cause epileptic fits which she said Goldens were prone to. Instead, she said I should give him Viacutan, which actually seems to be a very similar product, so I'm

.
I've since done a bit of internet digging and it would seem that for epileptic dogs/people, evening primrose oil shouldn't be given as it can make fits more likely. However, this is presumably only in dogs/people who already suffer from epilepsy (which my dog doesn't) rather than causing the condition in the first place.
As I've said, the two products seem to be very similar so has anyone got any knowledge/ideas why Viacutan should be considered preferable?
Thanks.