Q. My dog is weak, lethargic and does not have an appetite. What's wrong with my dog?
DESTINI R. HOLLOWAY, DVM
A. Unfortunately these are very vague symptoms and can mean a lot of different disease processes so to guess would not be fair to you or your pet. I would highly recommend that you get your pet examined by a veterinarian and bloodwork ran to look for underlying causes of these symptoms.
Hopefully this is not an emergency situation and his vitals are ok (i.e heartrate, respiratory rate and blood pressure). If they are not normal then take him to an ER vet right away.