Prohibition throughout the 1920s in the United States prohibited alcohol which created a black market operated by organized crime and independent Moonshiners. These men brewed alcohol in the countryside where the still was less likely to be discovered. However, trudging through mud left footprints that allowed the authorities to track the culprits. As the most natural thing to discover in meadows was hoof prints, an ingenious idea was manifested to overcome this problem. A wooden block was carved to resemble the hoof of a cow and attached to a strip of metal which was then attached to a shoe.