Any of the following can cause weakness and lethargy in dogs: Tumors/cancer. Pain. Trauma. Chronic or acute diarrhea. Snake bite. Hypothyroidism and other hormone problems. Anemia. Poisoning (for example from eating foods that are toxic to dogs, like garlic, leeks, or onions)
Why is my dog lethargic all of a sudden?
The most common causes of lethargy in dogs are: Infection, including parvovirus, distemper, kennel cough and leptospirosis. Metabolic diseases, such as heart problems, liver problems, diabetes, and hypoglycaemia. Medications, such as newly prescribed drugs or a new flea or worm product.
Can dogs be lethargic for no reason?
If your dog is lethargic with no other symptoms, for example, she may simply have overtired herself on a long walk or playing at the dog park, or she might be too hot but not yet at the point of heatstroke. But if she has other symptoms, they can help you pinpoint the cause of the lethargy.
When should I be concerned about my dog being lethargic?
Lethargy is a sign that something may be troubling your dog. A lethargic dog may be uninterested in playing, going for a walk, or participating in activities they usually enjoy. Normal fatigue or sore muscles can sometimes be due to high temperatures, but you should see a vet if symptoms persist for more than two days.
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