This may be a stupid question
Although it may make all the difference in how my dog takes in the nutrients in the egg shell.
I don't own a blender but I'm very willing to go out and buy one if powder egg shells are better than just casually crushing it with my hand.
Sorry for the short question, thanks for any help in advanced.
I feed a fair amount of eggs. My practice is to give the occasional raw egg (whole in the shell), but more often will gently cook the whites alone (serving the yoke raw) or do a lightly cooked "sunny-side up" fried egg cooked lightly in a saturated fat (like coconut oil). In all cases I serve the shell, which I let the dog crunch.
I do not know about the digestibility of whole shell vs grinding, but as part of a balanced PMR diet is isn't something I sweat. Were I replacing bone (say I had a dog with bad teeth) I'd probably do the sterilize and grind routine.
During periods where I'm feeding multiple egg a week ,I lightly cook the egg whites, as raw egg whites reportedly can bind with dietary biotin. Egg yokes has a lot of biotin, so the issue isn't clear-cut, but when I feed eggs regularly I set the eggs whites just in case.