If you want to try something natural the 2 products below are excellent!
This is a combination of herbals and nutrients to strengthen and rejuvenate: Standard Process Musculoskeletal Support: info here: https://www.standardprocess.com/Prod...eletal-Supportpurchase here: http://www.amazon.com/Standard-Process-Canine-Musculoskeletal-Support/dp/B001FSB640/ref=sr_1_1?ie=UTF8&qid=1409528583&sr=8-1&keywords=standard+process+musculoskeletal
This is combination of Homeopathic Remedies that are fantastic for injuries and pain: Traumeel: http://www.healthypets.com/traumeel100tab.html
Not all herbals work for all dogs or people. You need to find the right combination, so if you do try these and it doesn't help let me know!