in the company's company's press release mike andres set, we want to produce food that people feel good about, farm to restaurants. inside the chickens we eat with dr. david walin inga. welcome to the program. >> thank you ray. glad to be here. >> is mcdonald's leading a trend or confirming one that was already underway? >> i would say a little bit of both. the trend may be started about a decade ago but with smaller companies like chipotle and panera. companies as large as mcdonald's makes a huge splash. >> why do companies dose chickens with antibiotics in the first place? >> that's a good question. the apt biotics on the face of it are used for a couple of different reasons. one, they're used for treating flocks where birds are sick. but as it turns out that use is pretty minor when it comes to the other uses. those uses are for making chickens grow faster, putting on weight with less feed. or to offset risk of infection from raising so many birds under conditions that are often not very sanitary crowded and very stressful. >> oh so by dosing them with antibiotics you are able to gro