Funny Blonde Joke

a redhead, brunette, and a blonde escape from prison they run to a farm where they hide in a barn in sacks so the cops look for them they go to the barn and the cop kicks the sack with the redhead in and the redhead makes a cat noise so the cop says oh just a cat and then he kicks the second one and the brunette makes a dog noise. the cop says just a dog and then he kicks the one with the blonde in and she says potatoes