- Infection: A variety of infections, including bacterial, viral, and parasitic infections, can cause dogs to feel lethargic and lose their appetite.
- Pain: Dogs that are in pain may sleep more and eat less in an attempt to conserve energy and avoid further discomfort.
- Organ failure: If your dog's organs are not functioning properly, they may experience a loss of appetite and lethargy.
- Cancer: Some types of cancer can cause dogs to lose their appetite and sleep more.
- Medications: Certain medications, such as steroids, can cause dogs to become lethargic and lose their appetite.
- Diabetes: This condition can cause dogs to lose weight and become lethargic.
If you are not sure what is causing your dog's symptoms, it is best to err on the side of caution and take them to the vet. Your vet will be able to diagnose the underlying cause of your dog's behavior and recommend the appropriate treatment.