This mutation can occur randomly in any pup at birth. They hardly are both blind and deaf, but usually show only one handicap at the same time.
Kiseilians don't rely that much on their eyesight, but both sight and hearing are the biggest help they have to defend themself from dangers.
Blind Kiseilians have their eyes fogged
They need to learn how to live with these disabilities and must receive a special training called Extreme survival path to breed. They can do common activities but they have -1 in DXT.
If you want to make your kises blind/deaf for lore, you can do it freely but remember that you get the stats and must do the additional training mentione above.
When you add it, write "(Acquired)" near to the mutation.