I purchased the Vetcare light therapy device to try to help my suddenly and seriously disabled Australian Cattle Dog, who has lost function in the hind legs. I am unable to take him to a therapy clinic as there are none in this area. I have been using the device both on myself for sciatic nerve healing and on my dog. So far, I seem to be benefitting more, but I am seeing a tiny bit of improvement with him as I continue using the device, along with massage and chiropractic care from a licensed animal practitioner. When I put the light directly onto his white fur, it turned that patch gray. I now hold the light above the fur but do not know why the light would bleach out his coarse white hair. With time, I may see more results for both of us. My dog is thirteen years old now and in good health otherwise.