Having been sceptical of using the bio flow collar i can now say my opinion has changed. My dog was on steroids and several forms of anti inflammatory and pain relief we have been using bioflow for about 4 months and she is off all medications!!! She walks free as a bird and no longer cries when getting up from being led down! She is a GSPxLab and is 10yrs old. I would hand on heart recommend this product I wish I could show anybody who was sceptical like me a video of the transformation! More than 5 out of 5 - Thank you Bioflow!