TIL that horses have no muscles in their lower legs, so their hooves act as “second hearts”. A horse that can’t move risks blood pooling in its hooves, which can cause tissue death starting from the hooves up. This is a key reason why leg injuries are often fatal for horses.

TIL that horses have no muscles in their lower legs, so their hooves act as "second hearts". A horse that can't move risks blood pooling in its hooves, which can cause tissue death starting from the hooves up. This is a key reason why leg injuries are often fatal for horses.
Recent research reveals horses’ hooves act as a ‘pump’ for blood, with no muscles in lower legs aiding circulation, highlighting the importance of hoof health.
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