I have done every available test on my dog, and will continue to do so as new ones become available.
While he still may produce an unhealthy puppy or two at some point, at least I will know it was not because I failed to make use of simple testing that is available. I would be horrified to find out a "defective puppy" could have been prevented if I had only bothered to do a simple blood test.
This thought has crossed my old and feble mind--- If we, as humans were as careful when we breed ourselves as we are when we breed our animals, there would not be a problem with overpopulation in this world and maybe we would have a more inteligent group sitting in our Capitol. Just a thought from an 83 year old, no longer in the "stud" pool. Bill
On a serious note, common sense on the part of the breeder and the dog owners has to come into play. There is a big difference between a dog that carries a particular gene and one that is affected by that genetic trait. Education needs to go hand in hand with the genetic testing.
Back the original post, some great links always come to my mind when thinking about dysplasia (or any polygenetic issue really-- I think allergies could be included here).
http://www.offa.org/ed_faqs.html This one is about elbows and how the incidence *and* severity of the issue is often increased in the progeny if breeding one parent w/ Grade 1 elbows.
http://www.britlabs.com/mating.htm This one (scroll to bottom of page) shows Labrador breeding pairs by OFA ratings.