Since it's recessive, and BOTH parents have to carry the gene for it to occur, I'd say it's not a HUGE issue. Yeah, it's bad when it happens. You can't control everything, though. A VERY well respected repro vet who is well known doesn't feel that these dogs should be pulled from breeding. So it's actually not my opinion, I'm sharing his.
Wrath of Grim z Dragon
"Mr. Grim"- Threaten my handler. I dare you.