The dogs become hugely valuable if they manage to complete owner Marlon Grennan`s training school to become security dogs in New Hampshire.
Kobe is one of a litter of eight puppies fathered by Hulk, the "gentle giant".
Mr Grennan said: "My reputation is built on how I breed and train my dogs. I`m looking for the next Hulk - the star of the future. And this dog is the star of the future.
"Hulk is the most famous dog that I have but I am always looking for the next big thing so I`ve got to keep marching forward and I think we have something here.
"Kobe is a wonderful dog, his father is the Hulk, he`s got great energy, great balance."
Kobe used to be shy to bite, but now he can attack and release on command, seeing off would-be assailants.
Mr Grennan`s business, Dark Dynasty K9s, supplies dogs to high-profile celebrities and billionaires as well as law enforcement around the world.
He said: "To me Kobe is absolutely priceless, I have no intentions of selling him, I absolutely want to make him the superstar that I know he can be.
"But if I wanted to turn around and sell him tomorrow, I have already been offered $40,000 multiple times for him untrained based upon who he is and where he comes from.
"Kobe as a fully-trained dog, I would easily get $100,000."
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