I would get your dog tested, go to your vet have them draw blood, then send it in to the place posted above, You will know in a couple weeks, Most are testing there dogs anymore before breeding, so a effected dog doesnt happen anymore, but there are still those with there head in the sand.........
There is no slight case
It takes a mutated gene in both the male and female to produce a couple effected pups in a litter,
So if you had a litter of 8, 2 would be effected while the other 6 would be carriers.
Alot has been talked about with what triggers a episode in a effected, in some effected it doesnt take a whole lot of excitement to trigger a episode, while some effected may never have a episode, which i believe is more the norm, otherwise if all effected were having episodes it would be almost a epidemic, there a alot of effected out there if you figure the amoount of breedings that take place every year and a % of them carrier to carrier, X 36% carrier rate X the amount of pups in a litter,
But know with a test there should be no reason to have a effected pup anymore......
Kevin
KB Kennels