What did the vet say? Most vets aren't qualified to grade hips precisely from x-rays, even if they know how to take the x-rays well, but they should be able to tell you if there's an obvious issue on these images or not. If this dog is two years or older you (or your vet) should be able to submit the x-rays to the OFA for precise grading, and I think they'll do preliminary grading on dogs between 12-24 months. But again, your vet should be able to tell you if his hip joint conformation is bad enough to be causing the symptoms you're seeing, and work out a treatment plan if they are, since I'm assuming you mostly care about figuring out how to keep your boy healthy and pain-free.