Toward the end of 2016, Duncan began contributing periodically to The Washington Post, covering animals and animal issues. Many of the stories end up being published in newspapers across the country. Here are links to those articles:
- This woman agreed to pay for all adoptions at an animal shelter. People took her up on it—and then some. December 22, 2016
- Some people remove their cats’ claws. One state may soon call that animal cruelty. February 24, 2017
- When a parrot is held hostage or cats go MIA, this pet detective is on the case. May 1, 2017
- Greyhound races are a thing of the past. Here’s why Florida still hasn’t learned that. June 16, 2017
- Your dog is big business, and Uber-like apps want it. September 27, 2017
- Little by little, domestic violence shelters become pet-friendly. June 15, 2018
- Listen to music composed to calm stressed-out shelter dogs. August 13, 2018
- How a stray puppy rescued from a trash pit became a movie star.February 16, 2019
- Sidecar dogs: One the road with some canine easy riders.July 11, 2019
- Animal Adolescence is filled with teen drama and peer pressure November 21, 2019
- Dogs are helping save Florida’s citrus groves from a devastating disease January 14, 2020
Here’s a piece Duncan wrote for The New York Times Book Review, reviewing four books about aquatic critters, published on Oct. 5, 2018. 
