In most places, the eggs come from battery farms. then there is the handling in the store.I have mostly stopped eating eggs. I miss them for sure. When I buy it is from the stores. Cost me almost $7.00 for a dozen. Why dont you trust the stores?
Recently California changed some rules so things are supposed to be better though.
I am hoping my hens will start up again and I have an order for Pita Pinta hatching eggs! It is very exciting!