Send us Fan Mail Half of the dogs in a massive nationwide study are getting supplements—yet few products face drug-level scrutiny before they hit pet store shelves. We sit down with researchers Drs. Janice O'Brien and Audrey Ruple from the Dog Aging Project to unpack what owners actually give, why they reach for these products, and how the evidence stacks up against bold marketing claims. We dig into the big three—omega-3 fatty acids, glucosamine and chondroitin, and probiotics—and map how u...