Many pets suffer with chronic diseases, such as cancer, that can often be managed in such a way that life is prolonged, although the quality of life is greatly diminished. For most pet owners this issue greatly influences the decision concerning euthanasia. Certainly, quality of life is a personal judgment; you know your animal companion better than anyone else. And while your veterinarian can guide you with objective information about diseases, and even provide a personal perspective of a disease condition, the final decision about euthanasia rests with you.