About 20 years ago (if not more) I was told by an Australian gentleman who noticed my GHD who was quite old was walking ok but advised me that in Australia green lipped mussel was widely used for dogs,especially older dogs with joint problems etc. Since that time I've used them for my elderly dogs (in tablet form).. Then was recommended a few months ago U move which was ok. I have a 17 year old sheepdog who is very stiff. Two weeks ago I was offered a free sample of Flex sprinkle and the difference in him is amazing, he's even jumping over fallen trees in the woods where I live. He'll now be on these to the end of his days. The service from this firm when I rang with a query I have to say was exceptional.