One of the related stories on the site talks about using feral cats: https://wamu.org/story/17/07/07/feral-cats-solve-d-c-s-rat-problem/ https://wamu.org/story/

One of the related stories on the site talks about using feral cats: https://wamu.org/story/17/07/07/feral-cats-solve-d-c-s-rat-problem/ https://wamu.org/story/17/07/07/feral-cats-solve-d-c-s-rat-p... There is a program to place feral cats with residents who request them and it has a waiting list. Its effectiveness is debated, and bird advocates don't like it.