Q: What do you get when you cross a cow and a duck?
A: Milk and quackers!
Explanation: Bad joke, my apologies… but it made me giggle.
A cow gives milk and ducks quack– but you already knew that. So, a duck that quacks could be called a quacker in the same way that a person who robs is a robber and a person who thinks is a thinker.
“Quackers” sounds like “crackers” which go well with milk! Enjoy some crackers and milk.
And here is a duck that milks a cow (and sings Old MacDonald):
Explain the Joke 