Why did the cow cross the road? (To get to the udder side!) Why do cows wear bells? (Their horns don't work!) What do you get when you cross a cow and a goat? (A coat!) What do you call a sleeping bull? (A bull-dozer!) What do you call a grumpy cow? (Moo-dy!) What do you call cattle with a sense of humor? (Laughing stock!) What do you call a cow that plays a musical instrument? (A Moo-sician!) Knock Knock! Who's there? Cowsgo Cowsgo who? No they don't, cows-go moo. Knock Knock! Who's there? Interrupting cow Interrupting cow wh... Moo!