Why do dogs tilt their heads?

The constant hand motion was pretty distracting. I want to tell the guy it’s okay to use your hands to help emphasize important parts of the script, but maybe pick a few points and not every. single. word.

To the point of the video, I’m in the “trying to hear better” camp. I’ll watch my dog go full head-tilt while I’m opening a can of dog food. Or just opening any can that might turn out to be dog food.