Advances in understanding canine aging biology are improving approaches to extending healthy lifespan in dogs, with quality of life — not just duration — emerging as the central welfare objective.
Canine aging represents a welfare trajectory requiring proactive management to maintain quality of life as multiple age-related conditions accumulate. The challenge is recognizing and treating each emerging condition — arthritis, dental disease, cognitive dysfunction, sensory loss — rather than accepting declining function as inevitable. Modern veterinary medicine offers increasingly effective interventions for age-related conditions, but these interventions are only beneficial if applied before welfare has deteriorated substantially. The distinction between extending lifespan and extending healthspan — the period of life with good welfare — is crucial. Medical interventions that extend life while welfare is poor are not straightforwardly beneficial. The emerging focus on healthspan in canine aging research, asking not just how to make dogs live longer but how to make their later years better, represents a welfare-centered advance in veterinary gerontology.