Would it help to buy organic or cage-free eggs?
Ive never seen data to suggest that those chickens are less apt to be salmonella-infected. They might be because, basically, theyre farmed the way they used to be in the old days — when farms had smaller flocks. Here, you have these gigantic egg-laying factories. And you can see that there are many opportunities for much wider contamination of the eggs.
Back in the old days, Hens weren’t forced into pens that were far too small for them. Nor were they forced, by the location of said pens, to eat their own feces.