Google has already shown off several robo-dogs, including one which has even taken part in military trials.
Now, it has unveiled a smaller, lighter version called 'spot'.
The four legged robo-pet can run, climb stairs, job next to its owner and even cope with being kicked.
Although Boston Dynamics has not revealed what Spot will be used for, it has released a video showing off its capabilities.
The 160 pound electrically powered and hydraulically actuated robot can walk, trot and even climb steps.
A sensor on the robot’s head helps it navigate over rough terrain - and to spot when humans, or another robo-dog, is nearby by, allowing it to follow its owner and run in formation.
The robot is also shown next to its 'big brother', known as big dog.
It has already been tested in its first live military trial with Marines in Hawaii.
Officially known as the 'Legged Squad Support System', it has taken five years to develop.
It can walk and run over rugged terrain, following a soldier while carrying 400lbs of their kit and weapons.
It is now being thrown into the Kahuku Training Area – completely controlled and field tested by five young Marines from India Company, 3rd Battalion, 3rd Marine Regiment.
The LS3 is a robotic mule, capable of traversing rugged terrain with Marines while carrying much of their load.
It is programmed to follow an operator and detect large terrain objects to maneuver around.
The testing for the LS3 is being observed by the Marine Corps Warfighting Lab during the Advanced Warfighting Experiment as part of Rim of the Pacific 2014, a military multilateral training event featuring 22 nations and roughly 25,000 people.
Lance Cpl. Brandon Dieckmann, a Las Vegas soldier, was given the task of controlling Cujo. - and admits he remembers watching clips of the LS3 on Youtube before he joined the infantry.
He said he never would have guessed he would be chosen to operate the machine, which has been affectionately nicknamed 'Cujo' by his company.
'The reality (is that it's) a walking robot and quadrupedal robotic legs are something that can be done (stood out to me),' Dieckmann said.
'They randomly chose us to operate it, probably because I wear glasses.'
The Marines used 'Cujo' to conduct resupply missions to the various platoons around the training area.
The LS3 brought water to service members in terrain difficult to reach by all-terrain vehicles.
'I was surprised how well it works,' Dieckmann said.
'I thought it was going to be stumbling around and lose its footing, but it’s actually proven to be pretty reliable and pretty rugged. It has a bit of a problem negotiating obliques and contours of hills.'
The LS3 is being used as a logistical tool during RIMPAC as opposed to a tactical tool, due to its loud noise during movement and problems traversing certain terrains.
'I’d say 70 to 80 percent of the terrain we go through, it can go through,' Dieckmann said.
'There are times when it is going to fall over, but most of the time it can self-right and get back up on its own.
'Even if it doesn’t, it can take one person to roll it back over. The way it is designed is that you can easily roll it back over.'
Huberth Duarte, an infantryman with India Co., 3/3, and an operator for the LS3, says the robotic mule has
become like a dog to him.
The controls are simple to learn and have joysticks, and he said it 'feels like playing Call of Duty.'
Putting the LS3 in the hands of young Marines is vital to the development of the program, said Ben Spies, a contractor with Boston Dynamics observing the AWE.
'We give the military hands-on so we can see what they will use it for instead of putting it in a parking lot.
'It helps us develop it more, because right now, only the engineers have it.'