Chickens, eggs and slaughter. It's a big industry and, simply put, not one with a happy ending for the animals laying the eggs.
The reality is that if we aren't paying attention to the source of our food or growing the food ourselves, we are willfully living in ignorance. Either get the eggs from a verified source, get your own chickens or don't eat eggs. This information has not been out for a long time and it's becoming kind of unacceptable for us to not take personal responsibility for voting with our dollars and resources.