Responsible dog breeders should make themselves aware of the genetic diseases that can affect their particular breed. There is no excuse for breeding dogs with hip dysplasia or a variety of other preventable diseases.
Here at Stud Dog Central I would like to encourage all owners, of both the studs and the bitches that are serviced by them, to consider carefully the results of negligence on the part of the breeders. For instance, hip dysplasia is terribly crippling and can occur in 50 percent or more in some of the larger breeds of dogs! It wouldn’t have to be like this if people who breed dogs would take the time, and the little extra money it takes, to have their dogs tested before breeding them! If the results come out less than "fair", simply don’t breed that dog. No amount of beauty or personality is worth subjecting resulting puppies to a life of severe pain and early death.
Talking with your vet can be a good place to begin. However, there is a wealth of information available to you through places like the OFA website, local breed clubs, and websites for numerous national breed clubs.
Here is a link to the OFA’s statistics database, where you can search for information by disease, or by breed: http://www.offa.org/stats.html. This information can guide you in knowing what things might be necessary to be tested for, in your particular breed of dog. Please take the time to familiarize yourself with your particular dog’s possible genetic weaknesses, and get him or her tested for them before using them to produce puppies.