Test results on 188 processed chickens from seven different free range and organic farms for the presence of Salmonella showed about 30% of the birds tested positive, a higher rate than for traditionally grown chickens,according toUSDA's Agriculture Research Service (ARS). The results were reported in the peer-reviewed Journal of Food Protection, volume 68, page 2451, or go to www.ars.usda.gov/research/publications/publications.htm?SEQ_NO_115=173331.