How to Strap on a Dog's Head

I'm chaining words together in a new and novel way, which I have never heard before. Um, so I'd love to put something on a dog's head. There must be ways or like some kind of signal that you can measure that reliably goes off if you're presented with something novel or surprising. For example, even like pupil dilation, your pupils might dilate because your brain wants to take in more information as it's surprised by what it's seeing. If there's some reliable way of the dog being surprised, then the dog doesn't understand language. That's one of the main things of language. It's not just saying something at you. To tie us all