What happens to the outer layer of a horse's skin?

• A. It is constantly dying and being replaced by new cells.
• B. It becomes thicker over time.
• C. It stops renewing after adolescence.
• D. It sheds in large sheets seasonally.

Answer: (A)

The outer skin layer, the epidermis, is in constant renewal. New skin cells form in the deepest part of this layer and gradually move upward, flatten, and die, becoming the tough, protective outer barrier. That dead, keratin-rich layer is then shed as new cells arrive from below, so the outer layer is continuously dying and being replaced. This ongoing turnover is a normal, everyday process, not something that happens only at certain ages or seasons. So the best answer reflects that the outer skin layer is constantly dying and being replaced by new cells. In grooming, you may see loose, flaky skin as part of this turnover, but there isn’t a fixed season when it sheds in large sheets.