There are few things as exciting for a dog than hearing the jangle of keys that indicates they are about to be driven to the dog park. The bombardment of sights and smells, and chance to run around in the great outdoors can be the highlight of a day.

That's very much true of Ku, the very regal-looking Siberian Husky of Japanese Twitter user @U_TANTOKU_36. As you can see from a photo @U_TANTOKU_36 took before their excursion at the dog park, Ku is very much a good looking girl.

You can literally see the twinkle in Ku's eye as she gets ready for a day of running and jumping around the park.

However, it's how dramatically different she looked after a day at the park that has people on Twitter in awe:

Koo's day at the park has resulted in a complete aesthetic transformation. Her once shiny and fluffy coat is now drenched in mud, and her tired face even looks a couple years older. Many on Twitter were amazed to think the photos were of the same dog, and some even joke that the park trip had changed Koo's breed.

As troublesome as the car rid home made of be, the dirty appearance just shows you how much fun one day at the park was for Koo.