Both my dachshunds have been getting a daily dose of K9JF with their morning breakfast (very palatable for my picky eaters) for the past 6 weeks and I have noticed there has been a big improvement with Oden & his movement (also both their coats are healthier looking). He is back to running with me and so far also hasn't had a bout of soreness either. I'm very happy with the results, Thanks TuffRock Team!-Leigh, Hercules & Oden