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.
Brain injury â lack of oxygen to the brain, or asphyxia. Hypoxic-ischemic encephalopathy, or HIE, is the brain injury caused by oxygen deprivation to the brain, also commonly known as intrapartum asphyxia. The newbornâs body can compensate for brief periods of depleted oxygen, but if the asphyxia lasts too long, brain tissue is destroyed. Hypoxic-ischemic encephalopathy due to fetal or neonatal asphyxia is a leading cause of death or severe impairment among infants.