The ORCAT project on Key Largo has had a significant impact on the outdoor cat population, reducing the number of cats from almost 2,000 to around 200 in twenty years. There are still concerns about the impact of these cats on endangered species of wildlife on the island, however.
Rowan, Andrew N.
"Managing Cats for Cats, Wildlife & People,"
WellBeing News: Vol. 2:
2, Article 1.
Available at: https://www.wellbeingintlstudiesrepository.org/wbn/vol2/iss2/1