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 attempted to start a conversation, "Say, look at that big bunch of cows."
The hired hand replied, "Not 'bunch', but 'herd'."
"Herd of cows."
"Of course, I've heard of cows ... there's a big bunch of 'em right over there."