Coat Color and Other Factors Influencing Hair Cortisol Concentration in Domestic Cats

    October 2025 in “ Journal of Veterinary Diagnostic Investigation ”
    Kirsten L. Nutter, Andrew S. Cooke
    Studysummary This study found that in domestic cats, black hair contained significantly higher cortisol concentrations than white hair, whereas ginger hair showed no significant difference compared to white hair. Additionally, a positive correlation was reported between hair cortisol levels and behavioral issues mentioned by cat owners.
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    Research cited in this study 5

    1. The Use of Hair Cortisol for the Assessment of Stress in Animals General and Comparative Endocrinology · 2018
    2. Predicting Hair Cortisol Levels With Hair Pigmentation Genes: A Possible Hair Pigmentation Bias Scientific Reports · 2017
    3. Influence of External Factors on Hair Cortisol Concentrations General and Comparative Endocrinology · 2016
    4. Short Communication: Factors Affecting Hair Cortisol Concentrations in Lactating Dairy Cows Journal of Dairy Science · 2014
    5. Cortisol Determination in Hair and Feces from Domestic Cats and Dogs General and Comparative Endocrinology · 2007