I started using your product on my two Shelties, Terra -11 and Nova -8. Nova had a small accident last year and this spring one of her back legs started to freeze up on her when she laid down. Terra has always had a tendency to come up lane if she overdid it chasing the frisbee. I approached my pet food store, and they recommended your product. After one month of use I saw Nova’s stiffness maintained, enough that we are now starting our second bottle. Thank you for a great product.