I just throw the whole egg in shell and all, if it doesn't break, she throws it in the air to break it and then eats the contents and then the shell. I do this a couple times a week usually, but I wouldn't use raw eggs as the only source of fattening up your dog.
Start out slow, only one and see how they handle it. Some dogs that have never had raw food, don't have all the bacT and enzymes up to par in their GI tract, but they will adapt and be fine.