My 5lb Brussels Griffon, Taurus, started to limp. He is 12 years old. I remembered about hearing SierraSil and called the 1-800 number to see if I could use the product on my wee Taurus. To my delight there was a pet formula. I ordered the product and started Taurus on SierraSil. I crushed one tablet every day with his breakfast meal. Within a few days there was a noticeable difference in the way he was walking. Thank you SierraSil for making a difference in Taurus’s quality of life. One pill a day is making a huge difference for Taurus’s quality of life.