Over at the knee

Also called sprung knees or goat knees, being over the knee is a serious fault. This fault not only put the horse in risk of bowed tendons, but also weakens muscles in the back of his cannon, inhibiting his balance. Being over at the knee also puts extra tension on the horse’s tendon and fetlocks, this often causes injury to the horse’s Sesamoid and Suspensory bones. An upright pastern paired with an over knee can do double the damage.