Here's why:
* Cold weather protection: Their thick coat provides insulation against the cold winds and temperatures of the islands.
* Protection from the elements: The long hair also helps protect their skin from the harsh weather conditions, including rain, snow, and salt spray from the sea.
* Shedding: They shed their winter coat in the spring, revealing a shorter, lighter summer coat.
Interestingly, Shetland ponies are actually a "primitive breed," meaning they haven't been significantly bred for specific traits. This means their long winter coat is a natural adaptation that has helped them survive in their environment for centuries.
Let me know if you have any other questions about Shetland ponies!