10 Biggest Early Warning Signs of Cancer in Dogs

4. Persistent Lethargy: More Than Just Fatigue

While dogs, like humans, can have off days, persistent lethargy is a red flag. A dog that is consistently less active, reluctant to play, or seems unusually tired may be experiencing more than just fatigue. Cancer can sap a dog's energy, making them less interested in activities they once enjoyed. It's important to distinguish between temporary tiredness and ongoing lethargy. If your dog shows a sustained lack of energy, it is advisable to seek veterinary advice. Lethargy can stem from various health issues, so a comprehensive examination is crucial to identify the root cause and implement the right treatment plan.