Senile Changes of Dog Skin

January 1967 in “ Journal of Small Animal Practice ”

K. P. Baker

epidermis dermis hair number apocrine glands dermal pigmentation

TLDR Old dogs' skin thins, loses hair, and may darken, but doesn't show some human aging signs.

The study conducted a histological examination of the skin from 14 aged dogs, revealing atrophy in the epidermis, appendages, and dermis, along with a decrease in hair number. Unlike humans, senile elastosis and dermal basophilia were not observed in dogs. Skin changes varied across different body regions. A notable feature in aged apocrine glands was the presence of yellow refractile granules in secretory cells, whose chemical composition was unknown but did not contain iron. Additionally, there could be a marked increase in dermal pigmentation.

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