I have a 10-year-old English Setter who had knee surgery about 3 years ago. He is a grouse hunting dog, so at times he gets a lot of exercise, and sometimes he would have some pretty significant stiffness in his knee. I have been using your supplement every day now for about a year and his stiffness has been maintained. Even if we hunt hard, or he spends a lot of time outside in cold weather, he has little to no stiffness since I started using your product. I’d like to thank you for the excellent product, and so would my dog!