"We bought Canine Mobility after our dog Ruby's annual exam. When we realized that at age 9 she was considered a "senior", we thought there must be something we could do to make her even more comfortable. (Our horse is on Smartpak products, but we were thrilled to find the canine section!)She wasn't exhibiting symptoms of pain or arthritis in an obvious way, but occasionally would favor one leg a little. Within 1 week, she was back to zipping around like a puppy. The "age thing" crept up on us, and we're so glad to find something that can restore her comfort and flexibility. We just sprinkle it on her dinner and she seems to enjoy it. Thanks for a great product!"