A typical blonde

Long head, blonde hair, blue eyes, Susan was a typical blonde. She was sick of all the blonde jokes. One day, she decided to get a make over, so she cut and dyed her hair. Susan also went out and bought a new convertible. The blonde went driving down a country road and came across a herd of sheep. She stopped and called the sheep herder over. "That's a nice flock of sheep." Susan said. "Well thank you" said the herder. "I have a proposition for you" said the blonde. "If i can guess the exact number of sheep in your flock, can I take one home?".
"Sure", said the herder. Susan sat up and looked at the herd for a second and then said "150". "That is exactly right" said the herder. "Go ahead and pick out the sheep you want". The blonde went and picked one out and put it in her car. Then, the herder said "Also I have a proposition for you. If I can guess the real color of your hair, can I have my dog back?".