Why was the cow afraid?
Because he was a cow-herd!
Why was the cow afraid?
Because he was a cow-herd!
This joke is a pun! A "cow-herd" sounds like "cow heard." And cows "herd" each other by using their ears... get it? You probably don't, you probably put the cereal in before the milk, or shower with your socks on. You definitely don't know what 'onomatopoeia' means.