Sure. I feed her a powdered probiotic supplement and mix it into something runny, sometimes raw egg.
She also likes them runny-scrambled, and when I feed the shells they are crushed up in that.
She doesn't really care for shells all that much, but the birds love them, so there is no waste!
Oh, Edit, there is some reason about bioten deficiency that you shouldn't feed raw egg whites. The conclusion over on the raw feeding forum was that you'd have to feed a large dog 30-45 eggs a month to have any issues. I feed raw eggs occasionally and don't worry about it one teensy bit. I do recommend that you research and come to a conclusion that you are comfortable with, or simply fry the eggs enough to cook the whites!