[QUOTE=Incantation;8911806]
There is a very big Mastiff breeder that has been breeding dogs for years that are known to produce epilepsy, so sometimes it is easy to predict. Of course unlike your friend, when confronted she gets nasty, blames the owners, and continues breeding.[/QUOTE]
Well, yes, sometimes breeders continue to breed dogs known to be affected with epilepsy, or that have produced it. In those cases, it wouldn’t be unlikely for the offspring to also be affected, but many of them probably aren’t.
In my friend’s case, there was no reason to believe that there was any concern for epilepsy when planning the breeding, nor that it was actually a genetic issue, because epilepsy is complicated. The issue in this situation also sounds complicated - it can be heritable but it can also be caused by a virus. Tough stuff to predict and/or eliminate.
If I were the breeder in the OP’s case, I’d probably offer to refund the purchase price and would want my own vet/repro specialist to evaluate the medical records and advise me.
It’s hard enough to be a breeder given what they can/cannot control, but it’s even harder when there is speculation in the breed about whether the breeder “did or didn’t” try to control. It is probably worth the money to do this the right way - even if the breeder and/or vet doesn’t think it’s genetic. Because reputation is really important in breeding.