Ok, this is just speculation, but does anyone know if this could be a recessive genetic issue? What if both parents carry the issue, and they don't show it because it's recessive? I seem to recall reading about this somewhere before... statistically, if that were the case, not all of them should have the defect, but I have to wonder. If this is indeed a possibility, would it make sense to breed the parents again next season? It seems like you'd want to know if they were carrying this trait or whether it was just a random occurrence. I mean, nobody would want a recessive defect like that being spread around in their collection. To the best of my understanding, this is the first time these two have been paired up. Maybe the other animals these two may have been paired to previously just didn't carry the defect? Again, this is just a bit of guesswork and wondering, and of course it's not guaranteed genetic, but I do feel like I should ask about this.