Fatigue is a symptom, rather than a sign. A symptom is something the patient feels and describes, such as a headache or dizziness, while a sign is something the doctor can detect without talking to the patient, such as a rash. Fatigue is a non-specific symptom, i.e. it may have several possible causes.
Indoor Cats. Indoor cats can live a long life, provided they're well taken care of and they're in good health. On average, indoor cats live 12 to 15 years. A cat may reach the age of 21, if he doesnât have any medical conditions and has a proper diet.
Fortunately, attentive cat owners provide all of those things. The numbers varied widely among all the sites we visited, ranging from 14 to 20 years. Based on the numbers we chronicled, the average lifespan of an indoor cat is 16.875 years.