Deep down, police K-9s are just like any other dog.

Start spraying water from a hose and they unleash the adorable puppy within.

Canine officer Max couldn't help playing around when his Vermont State Police trooper partner Nicholas Arlington washed his patrol car in Royalton on Sunday.

Video posted to Facebook shows him repeatedly leaping into the air, chasing the water as the hose is waved from side to side.

"It's a little warmer today, and a good chance to clean all that winter grime off your cars. If you can find a helper..." Vermont State Police wrote on Facebook.

Max celebrated his second birthday last July, and proved his puppy ways even further with this adorable picture:

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