Here is a light therapy solution for pets that helps relieve their pain. The LumaSoothe comes with two powerful photonic light modules for skin surface and deep tissue treatment. You can use this device to reduce symptoms of arthritis and back/joint/muscle pain.
The device is pretty easy to use: simply put it on the area to be treated, complete a 15-minute session, and you are done. It has a rechargeable battery. More info is available here.