I'm sure most of you out there are dog lovers, and a lot of you probably think the mame-shiba dogs in this anime are cute. Well, they are. But the thing is... this "breed" shouldn't really exist. Up until a few years ago, it didn't.
I mean, it's not as bad to purposefully breed big shiba inu dogs to become toy versions of themselves, as it is to purposefully breed, say, cats that can't walk. (Which has been done. There are creepy people out there.) But reputable shiba inu breeders are very distressed by this trend, and how quickly dogs are being downsized.
The reputable toy dog breeds that we have today have to be bred very carefully, or you get things like brains that don't fit inside skulls, or females being too small to bear puppies safely. Also, many people underestimate the amount of energy that toy dogs have, and the amount of playtime and walktime they need. If you have a big dog in a small dog's body... well, you get lots of problems. Any genetic problems in the original breed are bound to get worse, because "new" breeds are generally inbred to fix the desired characteristics. And so on.
The more demand there is for "mini-shibas", the less incentive there will be for breeders to breed carefully, and the more likely it will be that puppy mills will get into the game. (And puppy mills are every breed's nightmare. I used to own a dog rescued from one, one of the few to be healthy and sane enough to save. It took her years to learn to look up, because she'd been confined in a cage all her life.) And of course with any new breed or any breed starring in a TV show, you get lots of people trying to own one as an accessory and not as a dog; and lots of those people try to breed for money, without having the faintest idea how to raise healthy dogs. It's not pretty when it happens.
So enjoy the fictional cuteness, but please don't run out and buy the real version. Full-sized shiba inu are intelligent and faithful dogs, but they barely survived WWII and there's not a ton of genetic lines to work with. More inbreeding they do not need.
Thus endeth the sermon.