Water fear

Question
My dog (Shiba inu) has suddenly developed a fear of drinking water from
a bowl. I have changed bowls, locations, even added broth to water, tried
different types of water, cold and warm. He will drink it if I poor it out onto
the concrete or from the shower floor. After he takes a drink he rubs his
nose on the ground as if it itches or stings. My vet says everything looks
fine. No teeth problems, appetite is great ,plays good, blood work is
normal. He is only 2 yes old so likely not a brain tumor. Any ideas

Answer
There are two possible explanations for this dog's behavior:

1.  He developed a fear response to the water bowl or its location, generalizing to water in any container, because of some event unknown to you and you have inadvertently contributed to it because you are caring/solicitous; by attempting to cajole a dog to do something upon which its life depends (drink water), it is possible to create even more anxiety and actually "train" the dog's aberrant response; or,
2.  "Only two years old" does not preclude vision disturbance, brain tumor, low level seizure disorder (temporal lobe).  

My first stop would be a veterinary neurologist for as complete an evaluation as possible (without MRI, CT scan, etc.)  If this professional's diagnosis is totally normal neurological function with no evidence of underlying problem, STOP interfering with the dog's water dish.  A physically sound dog (meaning no underlying condition at all, whether disease or other) will not STARVE itself and will not REFUSE to drink: these are absolutely required in order to maintain life and these impulses are so fundamental that they are a natural drive.  If you put the water dish down the dog will eventually have to choose to drink.  BUT you must first rule out any possible neurological cause.  Your description of how he rubs his  nose on the ground after drinking indicates a behavior that dogs normally offer when scenting prey/other interesting odor.  To me, this behavior indicates a reasonable cause to suspect underlying physical cause.  One veterinarian can very well say "everything looks fine" but the reality is everything is NOT fine and the dog is demonstrating a strange reaction to water.  Find a neurologist.