Was there any signs of pain on orthopaedic exam and manipulating the hips?
Or does he show any signs of pain in general, I think the problems start occuring more once there are any arthritic changes to the hips which comes later on sometimes.
If he is showing no signs or pain or hesitation when doing things and at the moment is completely unbothered, then I would discuss it further with your vet about have him constantly on NSAIDs at the moment and maybe think about using it as and when you might have too if he really doesnt need them at the moment. I know he is on other supplements, but it might even be worth trying Mobile Bones Ive had great results with it for Kobis re-occuring lameness that they couldnt find a reason for, and Im pretty sure its Sixstar whos got a dog with HD who was on NSAIDs and with the Mobile Bones he now only has to have it occasionally when he really overdoes it.
Hopefully she will see the thread but you could also perhaps PM or leave a message on her visitors message and ask for advice.
If you want to read more up on it in the meantime
Dogs Joint Supplement | Glucosamine for Dogs | Mobile Bones | Pooch and Mutt
There are also these suggestions from the Natural medicines centre that may be of interest, I think you can even contact for advice
arthritis/joint problems
Animate: a powder containing a natural source of Chrondroitin with Vitamin C especially useful in the early stages of arthritis.
Can B: a supplement containing minerals and vitamins (especially Boron) which help to strengthen bones and joints
Cortavet: a supplement containing Chondroitin, Glucosamine Hyaluronic acid and MSM, chondroprotective agents which promote cartilage formation and joint lubrication.
Magnopulse magnetic collar: the magnetic field of this collar stimulates blood flow to diseased tissue and has an anti inflammatory and pain killing effect.
Yarrow: a combination of herbs that have traditionally been used to relieve inflammation and stiffness of joints.
Animal Magic Vitamin C & Royal Jelly: helps strengthen weakened bones and joints.
Arthotabs: a supplement containing green lipped mussel and other nutrients that nourish diseased joints and help relieve symptoms of arthritis.
Cartamine: a Glucosamine based supplement that helps repair damaged cartilage in arthritic joints.
Cod Liver Oil: a fish oil supplement proven to improve joint mobility.
Glycovetriflex: a supplement containing green lipped mussel and other natural remedies that improve strength and flexibility of arthritic joints.
Dr Reckeweg R 73: a homoeopathic combination for arthritis, especially of the back, shoulders, hips and knees
http://www.naturalmedicinecentre.co.uk/index.php?option=com_frontpage&Itemid=1