Dog leaps out of moving vehicle to chase after deer

This is the moment a German Shepherd jumped out of a car on the move - to chase after a deer.

A motorist driving behind the vehicle captured the moment on camera in Rochester, New York, USA.

Video shows the pooch poking its head out of the car window as a deer can be seen eating grass, completely unaware of its furry admirer.

Unable to control itself, the German Shepherd jumps out of and chases the deer.