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Michael Dym, V.M.D.
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Dr. Michael Dym
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Hyperthyroidism in Cats

What is hyperthyroidism?

Hyperthyroidism is an excess of the thyroid hormone, thyroxin. Thyroxin determines how quickly your pet burns fuel and makes energy. Because every cell in the body burns fuel, every cell is affected by hyperthyroid disease, but the first sign we often notice is how thin the pet is despite having a ravenous appetite.

Key facts about hyperthyroidism in cats
  • Hyperthyroidism is a serious disease of aging cats.
  • Personality changes include cats becoming aggressive and irritable.
  • Hyperthyroid medications can be rubbed on the ear after it has been compounded.
What causes pets to develop hyperthyroidism?

Over the last few years, the incidence of hyperthyroid disease has markedly increased in cats (Feline Hyperthyroid Disease). Some believe that hyperthyroid disease is caused, in part, by the chemicals in the plastic liners in canned cat foods. In the few dogs that develop this disease, thyroid cancer may be the cause.

Recommended pet medications for ctas with hyperhyroid disease
Which pets are most at risk for hyperthyroid disease?

For cats, especially older cats, feline hyperthyroidism is very common; however, there is no breed predisposition. Dogs rarely develop hyperthyroid disease.

Tip

Prolonged use of thyroid medications is believed to cause damage to the liver and kidneys. Using a powerful antioxidant such as Proanthozone can help prevent free radical damage.

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