Thanks for all the compliments on my Madix-monster!!
It is a brindle mark on his chest. Actually, that's my favorite spot on him, I call it his sweet spot. When he was a baby it was more heart shaped.
It's gotten bigger and paler as he's gotten older but it's still a light tan, not white. He also has one brown brindled toe, the rest are black, which I love.
Ooo I could enter that photo...but I have lots of him "working". I have dock jumping, agility, obedience and carrying his pack...I'll see waht I can find!