A researcher counts Lactobacillus colonies forming in a petri dish at Otemchi Biotechnology's laboratory in Singapore April 24, 2015. In barns filled with classical music and lighting that changes to match the hues outside, rows of chickens are fed a diet rich in probiotics, a regimen designed to remove the need for the drugs and chemicals that have tainted the global food chain. The Lactobacillus is produced in the lab to mix with chicken feed for Kee Song Brothers' drug-free poultry farms. Picture taken April 24, 2015. To match POULTRY-DRUG/ REUTERS/Edgar Su