A common finding with full-thickness vertical wall cracks is which of the following?

• A. Corium protrusion
• B. Pus drainage
• C. Hairline separation
• D. Epidermal shedding

Answer: (A)

When a vertical crack in the claw wall is full thickness, it passes completely through the hoof wall to reach the tissue beneath. That direct exposure can cause the corium to protrude through the crack, which is a common and defining finding of deep, full-thickness cracks. The other options describe changes that aren’t inherent to a crack reaching the corium: pus drainage implies infection or abscess formation rather than a feature of the crack itself, a hairline separation is too superficial to involve the corium, and epidermal shedding refers to loss of outer skin layers that isn’t specifically caused by a deep crack exposing corium.