Scrambling the eggs in the blender with the shells is a good way to feed them back to your layers so they benefit from the extra calcium. Plus it's fun to watch them as they blend. We just drop the whole egg in the blender and let the machine do all the work. I don't think you need to do anything special, maybe limit the oil or butter, maybe avoid using artificial ingredients. You can add all sorts of goodies that are beneficial to chickens like red pepper & garlic, toss in wilted veggies or stuff your humans won't eat.