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Dog Lethargic

There are many possible reasons that can make a dog lethargic.

If your normally-energetic dog has suddenly slowed down, and has lost enthusiasm in doing his favorite things (e.g. walking, playing games, eating), you need to pay attention and try to find out what is making your dog lethargic.

Lethargy in dogs in a common illness symptom. If a dog is sick, injured, or depressed, lethargy is almost always one of the first symptoms to show. The difficult thing is, a lot of illnesses can make a dog lethargic, and so it is impossible to pinpoint a particular physical problem in the absence of some other symptoms. It is therefore essential that we observe our dog carefully for other symptoms or abnormal behaviors if the dog suddenly becomes sluggish.

Possible Causes

Infectious Diseases

Young puppies are normally full of energy. If they suddenly become lethargic, it may be because of some kind of infectious diseases, such as distemper, or parvovirus. Check the body temperature of your puppy if she suddenly becomes lethargic. (Normal dog temperature is between 101°F to 102.5°F.) If the dog lethargy is accompanied by fever, take your puppy to the vet immediately.

Anemia

If a dog is anemic, there are not enough red blood cells to transport oxygen to different parts of the dog's body. A lack of oxygen can make a dog lethargic.

Anemia can be caused by flea infestations, gastrointestinal parasites such as worms, or more seriously, internal bleeding caused by ulcers or other conditions (e.g. poisoning, clotting disorders, bone marrow disorders, cancer).

Other Diseases

Other diseases that cause lethargy in dogs include diabetes, hypothyroidism, Addison's disease, and Cushing's disease.

Pain

Pain caused by injuries or physical problems can also make a dog lethargic. If a dog is in pain, obviously he does not want to move too much. As well, in the case of an injury, many of the body's resources and energy are redirected to the injury site to promote healing, so it is understandable that an injured dog does not have sufficient resources or energy for other normal activities.

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