JUDY WOODRUFF:

Next: the final installment of our special series Stopping Superbugs, which this week focused on the potential dangers of antibiotic use in industrial-scale farming.

Last night, science correspondent Miles O'Brien paid a visit to a pig farm.

Tonight, economics correspondent Paul Solman picks up our reporting by checking on how things are done on a commercial chicken farm.

It's part of our weekly economics feature, Making Sense.