It was passed on to me by a friend who is into 'natural' healing. Did it work for our Spotty Dog? All I can say is that she is up and moving. Has a hitch in her getalong from the pelvic fracture but she's 8 years old now. Did the DMSO help her? Dunno. Did she help herself? Probably. Did the anti-inflammatories the vet gave her help more than the DMSO. Dunno. Did we help her. Probably. I know it didn't hurt her and I know that some of the bad press I'd read about it was from individuals who abused it so for me the jury is out yet. But I have an inquiring mind and do believe in complimentary medicine so it's still in our medicine cabinet waiting for one of the dang fool dogs to do something stupid again.