I was thinking, "truth was probably closer to 30 cats than 14,000", until I looked up Borneo in wikipedia. It has over 280,000 square miles, so 14,000 cats works out to a little over 20 square miles per cat. So, I could believe that they needed something like 14,000 cats to make any difference.
By the way, where I live in southeast Austin, Texas, USA, I have seen feral cats catch rats on many occasions. So, for those who think feral cats catching rats is not a real thing, believe me, it totally is. Most of the time it probably happens at night, and I'm not outside that often even during the day, so if I've witnessed it on multiple occasions it must not be very rare.
By the way, where I live in southeast Austin, Texas, USA, I have seen feral cats catch rats on many occasions. So, for those who think feral cats catching rats is not a real thing, believe me, it totally is. Most of the time it probably happens at night, and I'm not outside that often even during the day, so if I've witnessed it on multiple occasions it must not be very rare.