i learned that during the alcohol prohibition in the United States, between 1919 and 1933, the transportation and manufacture/growing of alcohol was prohibited. Some people who made Moonshine (a type of whiskey) did so in the middle of a forest or meadow. Moonshiners were often wanted by law enforcement.
Authorities often had to track down alleged criminals on foot. So, to avoid capture, some moonshiners changed their shoes because a set of human footprints would be suspicious and indicative of people preparing or transporting alcohol. Specifically, they put on cow shoes.
Hoofprints were used to make sure the police never followed the tracks. Obviously if they came across a still they would do something about it. But with footprints, the thinking is that if the police found these footprints they would think nothing of it, whereas if they found human footprints they would possibly follow them and ultimately discover a still.
A 1922 article in a now-defunct St. Petersburg, Florida, newspaper called the Evening Independent carried a story about moonshiners wearing "cow shoes" to fool the police - instead of leaving suspicious footprints leading to their secret stills, they left innocents cow footprints.