Hi Roberta, I looked up the article on your web site and made a search for "campylobacter and chicken", sorted by "campylobacter". There are a lot of articles, I scanned the following one and found it quite good: http://www.aomc.org/NewsRelease/Campylobacter.html > They must be all or mostly sick, right? Yes, "the birds carry it without becoming sick" After scanning the article, campylobacter doesn't seem to be very dangerous. And with a strong immune system it might cause no symptoms at all. But I didn't find any facts regarding free range chickens. So I can't say if chickens like the ones from Rex Harrill or ORKOS, who live very naturally, do also contain the organism. Karl