We can not begin to tell you what a difference your product has made for our Jack Russell, Jake. When he was diagnosed, our veterinarian put him on a dog arthritis treatment that was a prescription costing over $60 a month and did not work well at all. LifeSpan was recommended to us by our dog trainer and within 3 weeks Jake was jumping on our bed again and handling the stairs with ease. We is happier, more mobile and doing just great! Thanks you and thank you again for the wonderful product and support!