YuMOVE Plus is a higher-strength formula than YuMOVE Senior, and it contains 20% more ActivEase Green Lipped Mussel, a major component of synovial fluid which helps to lubricate and cushion the joint. YuMOVE Plus also contains an additional ingredient, N-Acetyl D-glucosamine, which provides the major building blocks of cartilage. YuMOVE Plus is formulated as a joint supplement for dogs that are in need of extra support due to significant joint issues, such as advanced arthritis or severe mobility challenges. YuMOVE Senior, on the other hand, is tailored specifically for older dogs that may be experiencing age-related joint stiffness, mild arthritis, or decreased mobility. In summary, while both YuMOVE Plus and YuMOVE Senior are joint supplements aimed at aiding joint health in dogs, they have slightly different formulations to address different levels of joint issues and the unique needs of dogs at different life stages.