Breeding from an unaffected dog that has already produced affected puppies
If two dogs have previously produced affected puppies, then this mating should not be repeated. If an individual dog in the mating that produced affected puppies is not affected for the condition themselves, you may still wish to use this dog for mating if it has other excellent qualities. When choosing an alternative mate for your dog, you should ensure that there is no record whatsoever of the condition in their line, paying particular care to immediate relatives. This should reduce the risk of puppies inheriting riskier genes from both the mother and the father.
Breeding from unaffected dogs with affected siblings or parents
This dog should only be considered for breeding later on in life, ensuring that it is not affected and does not develop the disease later in life. When choosing a mate, you should ensure that they have no record of the condition in their line, paying particular care to immediate relatives.