I think I've met Taz at the dog park, assuming your sister lives in the area as you once did and I'm thinking of the right dog. Few Shibas ever go to the dog park I go to though there are occasional ones.
I used to work for Holly Farm Kennels in Souderton Pa and they breed Shibas. We had Who Do You Voodoo male champion and ....I forget the female's show name, we just called her by her house name which was The Devil.
Mine does a real bark maybe 5x a year and its just a single "woof". He will scream like a cat being skinned alive at the vet. They have to put a muzzle on him because the noise is so deafening. They learn to use it quite effectively as puppies, and know that people will stop messing with them (trying to clip nails!) and cover their ears.
It kind of sounds like mating foxes.
Otherwise, nearly silent dogs. If I didn't walk mine, my neighbors wouldn't know I had a dog.
He also would constantly nip my dog in the face all day every day. Big Rhodie being nip by mini devil. Amani would ignore him 98% of the time. I don't know if Taz would talk about Amani's mom or what but he would go after him and pin the Shiba to the ground with his front paws and mouth on neck. Rhodie would slowly let him get up and if the Shiba was still on defense he would get pinned again. Amani wouldnt let him up until there was a truce.... lol. Then, he would go right back to the nips (when ever Amani would walk/ trot around. He would leave Amani alone as long as he would sit or be still)
*^*^*^ Himmlische Traumpferde
"Wenn Du denkst es geht nicht mehr, kommt von irgendwo ein kleines Licht daher"