Smaller animals shake more quickly than larger animals. A certain spinning speed is required to remove water from fur. Larger animals have a size advantage and do not need to shake as vigorously to get their skin whipping fast.
Mammals' shaking is very effective. A shaking mammal can remove about 70% of the water trapped in its fur in few seconds, when fully wet. The remaining moisture content (RMC) in the fur is about 30%. When comparing the accelerations generated by animals to data gathered on our "wet-dog simulator" (see Methods below), we note that animals shake in the region where drying tapers off.
We found shaking longer or faster does not contribute to further drying. Therefore, mammals "tune" their shaking to achieve maximal dryness with the least effort.
The smallest animals lift their front paws to shake (full video).