Get online and do a search.......you can actually find out more info than we can offer you.......probably as much as the Vet knows........this makes me very upset that if it is an inherited gene....then the breeder should know this and/or be made aware of this........
I feel so bad for you and both of your babies......they deserve to be together.....puppy to human.....
Let me know if you want me to help you look anything up.......
