These areas are exposed to sunlight + air pollution just like your face; they also have
less oil glands than your face, so they dry out (and age!)
Not exact matches
That means there's
less insulin in your bloodstream, and that causes your sebaceous (
oil - producing)
glands to be
less active.
As pet's age, their skin
glands produce
less oil, which increases the chances of dry, flaky skin and matted hair.