The shock that magic can inspire is a reaction to the difference between what happened and what someone expected to happen. What individuals expect to happen reveals a lot about the way their minds work. When dogs watch their guardians disappear behind a blanket and then see nothing when that blanket falls to the floor, they are understandably confused. That’s because dogs are perfectly capable of realizing that something weird is going on when people vanish, and many are upset by this curious phenomenon. In this compilation of dogs (along with one bird and a cat) there are many different reactions to seeing people disappear behind a blanket in a magic trick.
Original source: https://thebark.com/content/blanket-magic