Do any of you remember Troll Dolls? In truth they were a little before my time. From what I'm told they were super popular in the 60's with a few short lived revivals in each subsequent decade. I do however, remember playing with them in elementary school. These weird little plastic leprechauns with tall colorful hair and a jewel on their belly were all the rage among 5th graders for about 3 months. I don't know what the jewel was officially for but at school we concluded that you could rub it for good luck.
Winnie has a spot on the back of her neck that I've come to the same conclusion about. It was the way we identified her from her litter mates... I guess to say it properly would be to say she has a "splash" of white but whatever. To me, it's the good luck jewel. I love it. I want to touch it all the time. I think it's funny to see a "splash" of white dashing down the dog park and know it's my pup pressing on ahead without me. (Although seeing the Corgi Smile on the return trip isn't bad either ;-)