I purchased the Bioflow horse rug and a dog collar (very sceptical whether either would work). The horse rug is good quality and it stays in place on a boisterous horse who like to roll in the mud. The magnets are on his hind quarters and I've got to say he isn't as stiff this year as he has been in the past. So yes, I think it works! The only negative I have about the horse rug is the strength of clips on the front, these need updated to heavier duty ones and would be the only reason To put me off buying again. The dog collar on the other hand was just rubbish and absolutely no good for a Labrador. If developing dog products you need a magnet in Velcro that can be attached to the dogs own collar or put inside a leg support (like an elastic aged doggy wrist band). I have had to order the latter from America. Would I recommend Bioflow - absolutely!