A state of sluggishness, inactivity and apathy of the dog or cat is known as lethargy (or listlessness). Symptom is also characterized by a loss of interest in enjoyable activities or exercise intolerance. Lethargy can be a sign of a chronic condition and life-threatening illness, and it is therefore always advised to visit the veterinarian. Lethargy is often caused by infections or medications.
How to Recognize
Your pet will appear fatigued and tired, and may sleep more frequently. Your pet may show a decreased interest in activity or appear weak.
Lethargy can be the sign of an infection, such as Heartworms or Kennel cough, or of a disease, such as Diabetes, heart disease, or liver disease.
Lethargy is a common sign of many illnesses/injuries. It is important to seek veterinary care if your pet appears lethargic.
Medication can also cause lethargy in animals, so be wary of any medications prescribed to your pet if they are already feeling lethargic.