HARI SREENIVASAN:

And now a story about cats, not the ones living in homes, but stray and feral cats that live outside.

By some estimates, there are 80 million feral cats in this country. And the question of how to control them is sparking controversy. Animal rights activists, who want to save stray cats, say there is an alternative to euthanizing feral cats, a method they say will control the cat population that's more humane and effective. But will it work.

Adithya Sambamurthy from our partner "Reveal" at the Center for Investigative Reporting has the story.