Here's another I just found on www.maximonline.com...

Tired of relentlessly being called dumb, a blonde decided to color her hair.

After leaving the salon a brunette, she jumped into her convertible and went for a drive through the countryside.

While driving, she saw a shepard with a flock of sheep. She pulled over and bet the shepard that she could guess how many sheep he had in his flock. If she guessed correct, she could keep one. Knowing there was no way she could guess, the shepard agreed.

“Two hundred eighty-seven,” the blonde guessed.

“I’ll be damned! That’s exactly how many sheep I have in my flock,” replied the shepard. “A bet’s a bet, so pick out your sheep.”

After much deliberation, the blonde found the most energetic and happy sheep, picked him up and put him in her car.

Just then, the shepard said, “Now wait a minute. You got your bet, now it’s my turn. If I guess your real hair color, can I have my dog back?”