Grand Circuit Denoix Collateral is for horses lacking symmetry, the contracted side is supported by the wide branch. This asymmetric shoe with a wide branch to support under collateral ligament injuries and a narrow branch to reduce pressure under subchondral bones lesions.
Please see picture to choose A or B shoe. The view is from the ground side (not foot side) of the shoe.
A is a left lateral / right medial
B is a right lateral / left medial