Most animals don’t get their reflections in a mirror. They’re also confused by stuffed facsimiles of animals. Even parrots get fooled. And this video also features a koala.
Some of these stuffed animals look like the real thing. It must be embarrassing for a cat or a dog to discover that this weird creature he’s been threatening is only a dummy. Imagine chatting up somebody, only to discover, after several minutes of making a spectacle of yourself, that it’s only a dummy. Mustn’t be surprised if it fools the animals.