Hello and welcome to Yogi. This lovely labrador is so sweet. Sadly he has struggled over the years with dysplasia in both elbows and hips. He has generally coped well. But in the last few years he has started to struggle.
His lameness varies. One minute he can be sound and the next minute he can totally lame. It is always in his elbow. Its quite likely its actally a nerve being trapped or a piece of free cartilage moving around and getting compressed. This can be incredibly painful.
This is very hard to treat effectivly. So in this case we are working on the pain control in the situation. This can be managed with massage and thermotherapy. We also work to maintain the muscle in the limb so that it doesn't deteriorate when lame. Muscle deterioration will add to the pain.
Keep up the good work yogi and dad!