I wouldn’t want to get in this kitty’s way.
Cats are territorial animals. In fact, it is said that they get attached to their surroundings and not their owner, but heck, every kitty is different, and every cat’s human understands their needs and wants perfectly.
However, the cat in the video obviously perceives herself as the ultimate ruler of the apartment, where no changes are allowed to be made without her consent. Hence, such an explosive reaction when she sees the stuffed intruder. I am sure that the cat’s family needn’t worry about their security – this kitty cat would defend their home even if a real tiger entered the room.
