How two next-door neighbors start treating each other badly, and how, once they start, they become obsessed with each other. Paul Tough reports.

Paul Tough visits Catherine Chalmers. She raises small animals and insects in her apartment, feeds them to each other, and photographs them eating each other.

This American Life contributor Paul Tough visits Catherine Chalmers. She raises small animals and insects in her apartment, feeds them to each other, and photographs them eating each other.