An Analysis of Canine Hair Regrowth After Clipping for a Surgical Procedure

    February 2004 in “ Veterinary dermatology ”
    Sandra F. Diaz, Sheila M. F. Torres, Robert W. Dunstan, Chalermpol Lekcharoensuk
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    TLDR Dog hair grows back in about 14 weeks after being clipped for surgery, and the season doesn't really affect this growth rate.
    The study aimed to determine the hair re-growth time in dogs post-clipping for surgery, the effect of seasons on this re-growth, and if seasons influenced the telogen:anagen ratio. It involved 37 Labrador retrievers clipped in different seasons: 11 in spring, 10 in summer, 6 in autumn, and 10 in winter. The results showed that hair re-grew to its original length in approximately 14.6 weeks in spring, 14.5 weeks in summer, 13.6 weeks in autumn, and 15.4 weeks in winter, indicating that the season had no significant effect on hair re-growth rate for dogs housed indoors (P=0.12). The telogen:anagen ratio, representing the proportion of hairs in the resting phase versus the growth phase, was also not significantly affected by season, with over 80% of hairs in telogen across all seasons (P=0.89).
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