Stinky Butt Dog goes nuts for potatoes. If he hears the potato peeler, he comes running in to the kitchen to beg for peels. If I give him a big slice of raw potato he goes into orbit.
But he won't eat a potato that hasn't been cut in some way! He can open the cupboards, and could gorge on potatoes if he wanted. I've even handed him a whole potato. No interest. It has to have been cut or peeled.