This is a soft swelling on the upper back portion of the hock at the back of the hind leg. The ligament connecting the hind cannon to the hock is strained. Does not usually cause permanent lameness. This is a bone growth on the hock and causes arthritis in the hock. Sickle hocked horses are susceptible to bone spavin.
Horses experience pain when flexing the hock and permanent lameness usually results.
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