Well, Charlee is pretty confident and he usually doesn’t shake, but Neva shakes all the time. She will just look at you and shake until you call her name. I’ve heard other people talking about their chihuahuas shaking too, so I know that it’s too uncommon. But I always had to wonder: Why do chihuahuas shake?
Most of the time, shaking is just part of the chihuahua’s normal behavior, and you should have nothing to worry about.