Spot the robot dog was challenged by a real dog in a video featuring Boston Dynamics' machine. Last week the Google-owned company uploaded a video of a humanoid robot that kept getting up after being pushed down. In the new clip the barking terrier chases the robotic dog around a parking lot even as the mechanical canine uses battle mode stances when facing man's best friend.    

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Spot was originally built for the United States military, according to CNET. The techno-canines could provide soldiers with help on the battlefield by carrying heavy equipment.

However, the LS3 robo-dogs were rejected because they are too noisy. Kyle Olson is a spokesman for the Marine Corps Warfighting Lab. He told Military.com the problem with the loud robots is that they would give away soldiers' positions to enemy troops.

The entire project cost about $42 million. Boston Dynamics teamed up with the Pentagon group Defense Advanced Research Projects Agency (DARPA).   

Boston Dynamics founder Marc Raibert told CNET that his program does not think of the LS3 program as being shelved. That is because the goal was to learn how practical it was to build legged robots instead of deploying robotic soldiers.

In the video the little terrier incessantly barks and stares down the big robotic dog, and even chases the robo-canine after it runs away. Spot crouches to show the little dog has won.  

The video seems to prove the belief that dogs have a sixth sense for detecting dangerous people as the pet pooch seems to think the robot is a threat.  

Alex is the name of the dog in the video, according to Daily Mail. It is owned by Android co-founder Andy Rubin who managed Google's robotics program in the past.  

Meanwhile, Google purchased Boston Dynamics in 2013. The company provides several robotic animals of different sizes. Spot can run, jog beside its owner, climb stairs, and react after being kicked.  

A sensor on the robotic dog's head helps it get through rough terrain. It can spot when humans or other robo-dogs are nearby, allowing it to run single-file behind its owner.

Venture capitalist Steve Jurvetson uploaded the video and reported that Spot is the only version of LS3 owned by civilians. He praised the robot's life-like movements.