No animal hunts specifically for Chihuahuas, but these tiny dogs can fall prey to coyotes, bobcats, pumas, Birds of Prey and even larger dogs if left unattended.
Typically, any animal that hunts another is a predator.
The first animal she hunts is a mountain lion, i think.
A predator is an animal (or human) who hunts another animal (or human). A predator hunts prey.
a predator
there is no animal that hunts them
a person or animal that hunts
humans
An animal that hunts other animals are called carnivores. The hunter is called a predator, and the hunted animals are called prey.
a food chain
A tiger.
Chimps and mandrills
a bobcat