Dog Shaking With His Head

Dog water shake science
High speed videography and X-ray cinematography were used in the study to understand the physics of the dogs body movements internally and externally.
“The scientists determined that shaking begins at the head area, which provides a solid point for the energy wave to propagate down the animal's body. The head can also twist more, resulting in higher amplitude waves. Once that process starts, the animal's head, body and skin all move during a shake”