Hi. Thought I would update you on what's happening with Charley. Took him to the vet today and had his hips x-rayed. While there the vet x-rayed his back also. All was good . Let me tell you, I was really relieved. Was very nervous waiting for results. We are now assuming that he has injured his hip bone, or, muscle, and because he is such a rambunctious dog, has not slowed down enough to heal. He is now on anti-inflamatories and rest for 7 - 10 days. Hopefully this will be what he needs and he will be back to his old self soon. Once again, thank you to all who helped me with advice.