* Underlying medical conditions: Illnesses like infections, parasites, or organ problems can cause lethargy.
* Pain: Your dog may be in pain and not wanting to move.
* Depression: Dogs can experience depression, which can lead to listlessness.
* Medication side effects: Certain medications can cause lethargy.
* Environmental factors: Extreme heat or cold can cause a dog to become listless.
A veterinarian can properly assess your dog's condition, run any necessary tests, and provide the appropriate treatment.
It's always best to err on the side of caution when it comes to your pet's health.