bring the teastas mor hahaThat would be one way
Test their strength, stamina and agility varying by breed, then give them a breed specific test ie German show Alsatians getting Schutzhund titled. If the dog gets a certain amount of points in the above tests, the dog will be allowed to enter the better KC shows. That should gradually have a filter down effect with non working pedigree dogs getting healthier.
But it would not solve the main problem. In that most breeders breed for the Judges, each judge has their own opinion on how a dog should look. As a judge is in place for years bree