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Vitamin A Poisoning in Cats

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Vitamin A Toxicity in Cats

 

Vitamin A is essential for a cat's night vision as well as for a healthy skin. It also supports the cat's immune system and contains important antioxidant properties, which help to protect the body against pollution, cancer formation, and other diseases. If taken in exorbitant levels, however, vitamin A can be toxic.

 

More commonly referred to as vitamin A toxicity, it usually occurs when vitamin A-rich food such as liver or vitamin A supplements are ingested at high quantities. Though it is likelier to occur in cats ages 2-9, it can affect cats of any age.

 

Symptoms and Types

 

  • Lethargy
  • Loss of appetite
  • Weight loss
  • Lameness
  • Rough hair coat
  • Constipation
  • Abnormal sitting posture (e.g., raised front limbs)
  • Skin allergy on neck and front limb regions

 

Causes

 

  • Vitamin A-enriched diets (raw liver)
  • Excessive vitamin A supplementation (cod liver oil)

 

Diagnosis

 

Your veterinarian will take detailed history of your cat, including asking questions pertaining to your pet's diet and supplement regimen (if any). A detailed physical examination will be conducted to rule out other diseases. In addition, your veterinarian will order routine laboratory tests, including a complete blood count, biochemistry profile, and urinalysis. However, the results of these tests are often found to be normal unless the cat has some concurrent disease.

 

In some cats the complete blood count may reveal an increased number of white blood cells (WBCs), especially neutrophils. A biochemistry profile, meanwhile, may indicate abnormally high levels of glucose in the blood. Your veterinarian will also take X-rays of neck regions to visualize the vertebrae present in neck area (cervical vertebrae) as well as other areas; new bone formation is often an indicator of vitamin A toxicity.

 

In order to confirm the diagnosis, however, your veterinarian will most likely order blood tests to determine the level of vitamin A.

 

 

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