once a blonde always a blonde

A blonde dyed her hair to red one day, then she takes a walk down the road and comes upon a farm. She walks up to the fenced yard where the farmer is counting his sheeps. The farmer said hello and that if she guessed how many he had, then she can keep one. The blonde thought it was a great idea, so she starts counting in her head. She finally guessed 26, which was RIGHT!!! The farmer was amazed, but he kept his word. She climbed over the fence and back with the animal in her arms. The farmer takes one look at her and the animal and says, " If I guess what natural hair color you have, can i have my dog back?"