My 6 year old female lab mix has been lame for about 10 months. She is not overweight and is a house dog who used to take 45 min daily walks. There is no known trauma. She has been to her regular vet and an ortho. No one has been able to diagnose her. Her x-rays are normal for her breed and age, and joint fluid was drawn, and is also normal. The ortho has ruled out OCD, biceps tear, and severe arthritis. He has now referred her to a neurologist for possible nerve root tumor (just ortho's next guess as no basis to support any diagnosis thus far). Her "worst" arthritis (which ortho feels is not the problem) is in both wrists, but no left leg (including shoulder, elbow or wrist) issues. Any suggestions are appreciated. I live in SW FL.