I feed mine eggs. But not raw. I scramble the egg in a ceramic pan (no oil needed).
For some reason, my pups won't eat cottage cheese...but they love ricotta. Sometimes for lunch, I give them a spoonful of ricotta & sprinkle their Solid Gold SeaMeal on top.
I used to grind eggshells to a powder & put it in their homecooked food. But then I bought BalanceIt. Plus, I think they get enough calcium in their diet now. They're not puppies anymore, so I don't get too nervous about the extra calcium.
But, I also have a Lab. I typically compost my eggshells. But I don't compost as much in the winter as I do in the summer. So, I crush up the eggshells in my hand & mix it around in his food. He's my winter composter