January 2019 in “Figshare” Redheaded people have higher levels of vitamin D precursor, suggesting their hair color may be an adaptation to low sunlight areas.
IRS-specific genes in Tan sheep hair follicles peak at birth and may affect wool crimp.
8 citations
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August 2018 in “Journal of Investigative Dermatology” Hair can naturally regain color after greying, and this change may be linked to stress levels.
The FOS gene helps hair growth in Tan sheep.
July 2023 in “Veterinary pathology” White-tailed deer can get a hair loss condition that might make them more vulnerable to environmental threats.
5 citations
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January 2010 in “The anatomical record” Most dogs have hair whorls on their chest and limbs, with shelter dogs and short-haired dogs having more chest whorls.
27 citations
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June 2020 in “Genes” Lykoi cats' unique sparse hair is linked to specific genetic variants in the Hairless gene.
Otter rabbit, mink, and blue fox fur can be identified by their unique hair structures.
61 citations
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June 2019 in “BMC Genomics” lncRNAs significantly influence koi carp skin color.
October 1890 in “Science” Pilocarpin can cause hair regrowth and color change in some cases but not in others, and it may have side effects in animals.
25 citations
,
December 2008 in “Journal of Dermatological Case Reports” Skin color may change how alopecia areata looks under a dermoscope.
30 citations
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December 2001 in “Experimental dermatology” Gonadal hormones significantly affect the severity of alopecia areata in mice.
January 2024 in “Medycyna Weterynaryjna” Horse breed significantly affects skin and hair thickness.
148 citations
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October 1997 in “Journal of Investigative Dermatology”
December 2025 in “Biology Bulletin” Baikal seals' skin shows normal features for protection and some pathologies possibly linked to climate change or a virus.
4 citations
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June 1980 in “American Journal of Clinical Nutrition” Malnutrition can change hair color due to altered copper and zinc levels.
5 citations
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July 2009 in “Clinical and experimental dermatology”
1 citations
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January 2013 in “Nasza Dermatologia Online” Vitamin B12 deficiency can cause reversible hair color loss in children.
January 1992 in “Proceedings of the New Zealand Society of Animal Production” Ferret hair growth starts between 0 and 4 days after melatonin treatment, with cell growth peaking in the hair germ and declining as the hair matures.
1 citations
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September 2020 in “Sahel Journal of Veterinary Sciences” Switching to coarser feed and providing hay improved the sheep's health.
13 citations
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November 2018 in “Animal Genetics” A new gene variant causes curly coats in some dog breeds.
9 citations
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June 2020 in “Animal genetics” Scientists found genes linked to hair length in Brangus cattle that could help breed heat-tolerant cattle.
17 citations
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October 2017 in “Scientific reports” Fine wool sheep have more genes for wool quality, while coarse wool sheep have more for skin and muscle traits.
38 citations
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June 2005 in “Acta Biochimica Polonica” Splenic eumelanin in C57BL/6 mice is different from hair eumelanin.
January 2006 in “Journal of Clinical Dermatology” 23 citations
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January 2019 in “Journal of wildlife diseases” Boreal caribou in northeastern British Columbia have significant health issues, including infections, tick infestations, and mineral deficiencies.
Genetic analysis of rabbits identified key genes for traits like coat color, body size, and fertility.
February 2024 in “Buletin Veteriner Udayana” The dog with severe hair loss and itching improved after treatment for ehrlichiosis and demodicosis.