Herd of cows?

A young man visiting a dude ranch wanted to be "macho," so he went out walking with one of the hired hands. As they were walking through the barnyard, the visitor tried starting a conversation: "Say, look at that big bunch of cows." The hired hand replied, "Not 'bunch,' but 'herd.' " "Heard what?" "Herd of cows." "Sure, I've heard of cows. There's a big bunch of 'em right over there."
Originally published November 14, 2002.