I have a large sledge dog who suffers from joint pain due to arthritis. He was initially on Rimadyl from the vet but as it can have side effects with long term use I searched for alternatives. I am amazed at how happy and mobile he is now since I have been giving him a daily dose of Flexivet Go. He has been taking it now for 6 months and is a different dog. He jumps up and down like a jack in the box now when he gets exited and that's something he hasn't done for 3 years! It has proved its worth to me now I can see my big old sledge dog happier, pain free, mobile. Excellent product.