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Hypothyroidism and Founder in Horses
  by Robert N. Oglesby DVM


Introduction » Anatomy and Physiology » Clinical Signs NOT Obesity or Founder » Diagnosis » The Truly Hypothyroid » More Info 

Hypothyroidism (HT) is a frequently misdiagnosed condition in adult horses that are overweight and have chronic founder. A sample measuring the two thyroid hormones, T3 and T4, is usually taken to confirm the diagnosis. The problem with this diagnosis is two fold:

  • Truly hypothyroid horses are unthrifty, have poor appetites, and are mildly depressed.
  • The blood levels of these hormones are quite variable in the healthy horse and do not accurately reflect thyroid function.
This article discusses the diagnosis, treatment, and prognosis of hypothyroidism in adult equines. Hypothyroidism has been well documented in newborn foals and for more information see: Hypothyroidism in Foals.
      ~Word Count: 3057 words (The average magazine page contains about 600 words);
      ~Last Updated: July 10, 2015;
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Discussions on Hypothyroidism in Adult Equines
  Titles Subtopics Posts Updated
iconHypothroidismJul 5, 08
iconResearch Summary: Thyroid Supplementation for Weight Control?Feb 11, 08
iconThyroid symptoms ?Sep 25, 07
iconThyroid supplementation -- probable misdiagnosisSep 19, 06
iconWhy is HYPOThyroidism Constantly Misdiagnosed?11 Jan 23, 07
iconThyroid TumorJan 26, 06
iconNewly diagnosed hypothyroidDec 26, 05
iconHypothyroid Adult Horse and Need for TestingFeb 17, 05
iconDiagnosis of Thyroid ConditionDec 18, 04
iconSwollen Thyroid and Stim testsNov 2, 04
iconCushings/Hypothyroid and low neutrophilsAug 6, 02
iconSoft Tissue weakness/damage in hypothyroid horsesApr 30, 02
iconThe myth of the cresty neck.Jul 12, 01
iconHypothyroidismMar 1, 04
iconHypothyroid ConfusionAug 23, 00
iconBlood draws for HypothyroidismAug 18, 00
iconPuzzled?????Jun 14, 00
iconLong hair coatMay 22, 00
iconSuspect misdiagnosed thyroid "problem".May 14, 00
iconCONFUSED!Apr 16, 00
iconHypothyroidism in foaling maresFeb 27, 00
iconThyroid Problem?Apr 4, 04
iconThyroid MedicationJun 2, 99
iconHypothyroid?May 17, 99
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