“Organic” is just another word for manure. Of course the non-organic are going to get contaminated if they process them in the same facility.
So true, I did a study about 15 years ago looking at Chickens eggs both from “Free Range” and those enclosed “evil” barns where the chickens were in cages. The ones in the enclosures were tested regularly for disease, and only breathed filtered air. Then any signs of disease were cleared. While the Free Range chickens wandered around the Fields, were in contact with all sorts of vermin, not tested.
Stay away from Organic and especially free range chickens