The Charcot Restraint Orthotic Walker, or CROW, is a rigid boot designed to accommodate and support a foot with Charcot neuroarthropathy (CN). The CROW consists of a fully enclosed ankle/foot orthotic with a rocker-bottom sole. It is a common treatment used after acute CN has calmed down to minimize further deformity and prevent ulcer development.CN occurs when bones and joints in the foot fracture, break up or pop out of place with minimal or no known direct injury. This deformity is most commonly seen in people with diabetes.