and i thought, well, with him being older, that s just part of life. there s a lot of stress in here. when you use this handle like this. reporter: age also brought pain for 11-year-old guide dog stanny. he s been on glucosamine chondroitin for about a year and he was starting to get stress in his shoulders. reporter: one out of five dogs faces pains or doggy arthritis. where drugs and painkillers have been the norm, now the red light of a laser is giving pets freedom from the pain. this laser basically goes through tissue and gets into deep tissue. and it works basically on cells that are unhealthy. and it stimulates them. it stimulates them to produce more energy. it stimulates them to heal. it stimulates them to release endorphins. you can just feel it. reporter: yeah, it s just warm almost like a heat lamp or something. exactly. reporter: at the village animal clinic dr. mike