This is Callen, he is an eight year old German Shepherd, and he is my running partner. We regularly run three miles several times per week and walk on other days. A few months back he began limping, after visiting our veterinarian, it appears he has arthritis in his knee and in pain. We began giving him canna pet after referral from a friend and after a short time he has shown noticeable improvement with less pain and very minimal limping. We are running and walking as usual and he is a happy dog!