Clinical And Diagnostic Insights Into Hypothyroidism In A Shih-Tzu: A Case Report

    March 2026 in “ Indian journal of veterinary and animal sciences research. ”
    H.V. Sanjay, S.P. Abhijith, H.J. Apoorva, D. Chandrakumar, A. Abdul Kalam
    TLDR A Shih Tzu with hypothyroidism improved significantly after 6 weeks of levothyroxine treatment.
    This case report discusses a 4-year-old neutered female Shih Tzu diagnosed with primary hypothyroidism, characterized by symptoms such as progressive weight gain, lethargy, bilateral symmetrical alopecia, and cold intolerance. Physical examination revealed a dull coat, seborrhoeic dermatitis, bradycardia, and mild obesity. Laboratory tests showed low total thyroxine (T4) and free T4 levels with elevated thyroid-stimulating hormone (TSH), confirming the diagnosis. The dog was treated with oral levothyroxine sodium at 20 µg/kg twice daily, leading to significant clinical improvement within 6 weeks.
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