Abnormal or unpleasant odors may be caused by diseased or necrotic tissue in the respiratory or upper gastrointestinal tracts, including mouth and nasal cavity. Diseased teeth are a common cause in dogs and cats. In addition, certain metabolic diseases may produce distinctive breath odor, e.g. ketoacidosis, uremia.
Practically elderly is a person who needs special consideration due to advanced age. Which can happen in late 50s or in late 80s. If he or she can punch your lights out for calling them elderly, and you cannot run from them either, they possibly aren't.
old age - a late time of life; old age is not for sissies; he's showing his years; age hasn't slowed him down at all; a beard white with eld; on the brink of geezerhood. eld, geezerhood, years, age. time of life - a period of time during which a person is normally in a particular life state. mid-sixties, sixties - the time of life between 60 and 70. mid-seventies, seventies - the time of life between 70 and 80.