OFA rates the hips as normal, fair, good or excellent. There are many OFA clinics held around the country each year though. Usually sponsored by the Old English Sheepdog and Mastiff clubs.
All dogs are welcome to participate.
I give mine the 500 mg chewable humane grade tablets from Costco. I use them too. I know this is a hard one, especially if you have a frisbee or agility lover.