Curlytails, if those are your fur kids, they are a handsome pair!
Ok, here's three more of JT's pictures. To me a Shiba Inu is a lot like one of our thick haired Northern Breeds. I had a Malamute mix and he shed throughout the year, although heavier during spring for sure. This guy is totally nonshedding and her hair is even to short to try to comb. I do hope you are wrong about an undercoat developing. My husband wouldn't be happy if she went from a non shedder to a shedder.
Today the vet suggested that she could have a Chihuahua parent and a Shiba/Basenji Mixed parent. He said this after I said I coudn't make up my mind what I see, that I see both in her. I think the man is a politician.
If I ever get rich, I'll have her DNA tested, but I won't hold my breath (about getting rich anytime soon).