Blonde and Sheepherd

A blonde decides to dye her hair as she is sick of all the blonde jokes people tell. A few days later she is driving in the country and she sees a flock of sheep and a sheepherder. She asks the sheepherd, "If I can guess the exact number of sheep in your flock can I have one?" The sheepherd agrees. "467." the blonde says. "Wow!" says the sheepherd, and she goes to take one. The sheepherd watches her, and then says, " If I can guess the real colour of your hair,can I have my dog back?"