Before, when I was running Braincade on this site, I categorized this game into a "Modern Myth" section because I think it's important to recognize our modern myths and enjoy them. Aliens stealing farm cows is one of those myths. In this game you have to protect your dairy herd with a shotgun.
Cows seem to be the subject of a lot of superstition such as Satanic Rituals too. I remember when I was a Christian as a kid back in the late eighties to early nineties there were all kinds of Satanic stories of cows being mutilated (which of course would lead to babies being sacrificed). Poor cows, everyone goes after them.