A blonde is tired of all the dumb blonde jokes, so she dies her hair black. Then one day she drives past a farm and sees a farmer with his flock of sheep. She stops and says to the farmer, "If I can guess how many sheep you have, will you let me have one?"
The farmer says, "Sure". She says, "112." The farmer says, "That's incredible. You're exactly right."
As the girl reaches for her prize and is putting it in her back seat, the farmer says, "Hey...if I can guess what color your hair used to be, can I have my dog back?"