What causes sudden weight loss in dogs?

Best answers

Many diseases can cause weight loss.

In fact, most chronic diseases will result in weight loss at some time during the course of the disease.

Metabolic disorders such as diabetes mellitus, hypoadrenocorticism (Addison's disease), hyperthyroidism (rare in dogs, common in cats), and cancer.

FAQ
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Weight Loss Causes in Dogs and Cats.

Because 2/3 of your pet's body is water, sudden weight loss may be caused by dehydration rather than by loss of fat.

Under some circumstances, your pet becomes dehydrated and loses weight too.

It's important to understand which is happening because dehydration quickly leads to death

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"Most chronic diseases will result in weight loss at some time during the course of the disease." Many diseases can cause weight loss.

Metabolic disorders such as diabetes mellitus, hypoadrenocorticism (Addison's disease), hyperthyroidism (rare in dogs, common in cats), and cancer.

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Kidney Disease in Older Dogs.

Another cause of rapid weight loss in dogs can be because of kidney disease, or kidney failure.

Other clinical signs can include weight loss, depression, vomiting, diarrhea and loss of appetite.

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One of the most common causes of alopecia is mange, which caused by the mite Demodex.

Hair loss can also occurs when there is a disruption in the growth of hair follicles, often from infection, trauma, an immune disease, or endocrine system abnormalities.

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2. Infection or Infestation.

An infestation with parasites such as fleas, ticks, and mites (scabies, mange) is another source canine alopecia.

Bacterial or fungal infections, such as in the case of ringworm (which is actually a fungus), can also be attributed to hair loss in dogs.

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Some medical conditions can cause dogs to become aggressive.

If a dog that has never shown any sign of aggression suddenly begins growling, snapping, or biting, it may be caused by a disease or illness.

Pain is an especially common cause of aggression in dogs.

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A wide range of diseases and conditions can cause anemia.

Some of the more common causes include: Trauma-related blood loss, for example a car accident, that causes internal or external bleeding.

Immune-mediated disease, which cause the dog's immune system to attack the red blood cells.

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