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Peer-reviewed veterinary case report

How long does dog hair take to grow back after surgery clipping

By Diaz, Sandra F et al.·Published in Veterinary dermatology·2004·Department of Small Animal Clinical Sciences, United States·View original on PubMed

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Original publication title: An analysis of canine hair re-growth after clipping for a surgical procedure.

Species:
dog

Plain-English summary

A group of Labrador retrievers had their fur clipped for surgery, and researchers looked at how long it took for their hair to grow back. On average, the dogs' hair returned to its original length in about 14 weeks, regardless of the season. This means that whether it was spring, summer, autumn, or winter, the time for hair regrowth was similar. The study found that the season didn't significantly affect how quickly the hair grew back.

People also search for: how long does dog hair take to grow back after surgery · Labrador fur regrowth time · dog clipping recovery time

Abstract

Hair growth and replacement have been studied extensively in humans, sheep and laboratory rodents, but in dogs and other mammalian species few studies have been published. The objectives of this study were: (1) to determine the time required for the hair to re-grow in dogs after clipping for a surgical procedure; (2) to define whether the season of the year influenced the period of time required for re-growth and; (3) to determine if season might influence the telogen: anagen ratio. Eleven Labrador retrievers were recruited during spring, 10 during summer, six during autumn and 10 during winter. Hairs re-grew to their preclipped length in 14.6 weeks, 14.5 weeks, 13.6 weeks and 15.4 weeks when shaved in the spring, summer, autumn and winter, respectively. The differences in these values were not significant suggesting that season has no effect on the rate of hair re-growth in Labrador retrievers housed indoors (P = 0.12). The mean values for the telogen: anagen ratio in each season were: 5.2 (spring), 6.1 (summer), 9.5 (autumn), and 5.3 (winter). The differences in these values also were not significant (P = 0.89). The percentage of hairs in telogen was over 80% in all four seasons.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/14989702/