Lack of suitable food !
It was the gekoes that killed them because of the DDT
Geckos are not at the top of the food chain. They are at the bottom.
Cats are carnivores by nature and normally prefer fish on top of the food chain, however, they will also eat grass if not feeling well.
The geckos were full of poison
In "Top of the Food Chain," the cats primarily ate the rats that they caught. They were skilled hunters, able to catch their prey and feed themselves in the absence of their owners.
Cats
The Geckos ate the flies that were sprayed with DDT. The cats ate the geckos that were dead and dying from eating the poisoned flies. Then cats started dying which allowed the rats to proliferate which allowed the spread of Bubonic Plague.
A domestic cat is just below a dog in the food chain. However, in the wild, big cats are generally at the top.
A bear on the top of the food chain.
is a sharks on top of the food chain
Top of the Food Chain was created in 1999.