Senior dog nutrition science has reversed traditional low-protein recommendations — older dogs actually need more high-quality protein to prevent muscle wasting that severely impairs mobility and welfare.
Senior dog nutrition welfare is complicated by conventional wisdom that has been overturned by research. The long-held belief that protein should be restricted in older dogs (to spare kidneys) applies only to dogs with established kidney disease — not to healthy older dogs. In fact, protein restriction in healthy senior dogs accelerates sarcopenia, the muscle wasting that causes mobility decline, weakness, and reduced quality of life. Modern geriatric nutrition science recommends maintaining or increasing high-quality protein in healthy senior dogs' diets. Monitoring muscle condition alongside body weight — through regular scoring of muscle mass over the spine and hindquarters — detects early sarcopenia when nutritional intervention is most effective.