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.
2 Contributions. Old is an adjective that can mean not new, or (for people and  animals) nonspecifically elderly, aged. It can also mean previous,  or superseded (e.g. old methods). Old can â¦be a negative  attribute (old shoes, old roof) or a positive attribute (old coins,  antique furniture). Sometimes it is too vague an adjective, as in  old car (which could mean 5 years old or 50) and old building  (20 years old or 300 years).