Measuring and maintaining quality of life throughout cancer treatment is a core welfare responsibility, with validated tools helping owners and veterinarians make informed decisions.
Quality of life in canine cancer patients cannot be inferred from tumor response alone. A dog whose tumor is shrinking but who is nauseated, painful, and disengaged has poorer welfare than a stable dog with good appetite and social engagement. Welfare-conscious oncology integrates quality of life measurement into treatment protocols, using validated scales to track changes over time and inform decisions about continuing, modifying, or discontinuing treatment. The owner's willingness to let go when quality of life deteriorates irreversibly is the ultimate welfare act.