I gotta say I was a bit hesitant about this product but all the great reviews allowed me to feel better about ordering it. I have an 11yr old Husky that has really started showing her age. She was slowly becoming more lethargic, having issues getting up, very stiff joints and sometimes slipped in the process of trying to get up (we have wood floors). I thought it was arthritis perhaps and bought this to see if there was any relief. Within a week I noticed huge improvements in her behavior overall. For one, she became very spunky in the mornings, wagging her tail, running around, this is not like my dog at all. She was always very mellow normally and NEVER spunky when waking up. Cool, I thought! Let's see how this thing works over time. It's been 4 months now and I have to say it's amazing. Turns out after a detailed vet visit and X-rays she has hip dysplasia. I told my vet about this product and her behavior and he said to continue giving it to her. She is not perfect and still an older dog but she is much spunkier on a daily basis, runs around being playful and is obviously feeling a lot better and less lethargic. There are days where she still has a bit of trouble getting up or has some stiffness but overall I've seen my dog's personality change for the better and acting more like her old younger self. I believe in this product and have purchased 3 more tubs (as I plan on continuing to give to her). Highly recommended!