Well, not in this case anyway. I love the OFA's website, and I do research there frequently. In the case of the potential sire of the Double litter, take a look at his vertical pedigree regarding hips. OFA: Display OFA Records You can see that his sire is OFA excellent. If you click on the sire's name you can see that he has so far produced 4 normal offspring. 2 Goods and 2 Fairs. His dam is OFA Good. If you click on her name, you can see that she has a sibling that is also OFA good, and has 12 offspring in the OFA data base. Of the 12, there is one excellent, 6 good, 4 fair, and 1 Mild in ONE hip. If we go on to the grand parents, we see that the sire of the dam is OFA excellent, with 3 OFA excellent littermates. This dog has 20 progeny in the data base: 5 excellent, 13 good, 1 fair, and one mild Uni. The pedigree behind the sire should produce a very good ratio of normal hips, according to what is in the data base. In Rottweilers we have a percentage of 18% dysplastic according to the OFA. So no matter WHAT you do, you are going to get SOME dysplastic offspring occasionally. I am comfortable with this choice regarding the hip background tho.