The Konoha Kat Kraze would go down in history.
Another unintended side effect. Miko was learning that there was a lot of those. Perhaps she should rewind? Well, after the fair, thousands of people went back home with something cat related. And in a village of roughly forty-thousand people that was a lot. They showed it off to their friends and used the cat cookie jar's or whatever. Then their friends thought 'hey, this is cool' and went to get some of their own.
Basically they started a trend.
The fair always had the potential to do that-which is why it's so hard to get in, but they apparently won the lottery on this one. And the excellent craftsmanship helped.
Suddenly everyone wanted a cat, and everyone wanted something cat related. The Art Institute had a hectic but very profitable first few months making cat ceramics. Suddenly cat summons that were regarded as the devil were constantly being pet by random people. Children shrieked in delight when the cats talked back or meowed. You could see people in the streets with cat ears or even some of the more hardcore people with black cat noses.
But even that was nothing compared to the business Nekobaa had. She later told Fugaku it was the best profit she had ever had. Period. She lived in the abandoned city where the Uchiha stored munitions and mostly selled supplies to the Uchiha. But she had a secondary location where she was more accessible to the public, and the place was hopping. She had personally thanked the clan.
Now came the second part of the trend; it wasn't a trend anymore. After two months and people had realized normal cats had to be taken care of. Given shots, etc. But by that time people had fallen in love with their pets. You could see grown men carrying cats like babies, and others with cats sitting on their shoulders. Restaurants put up signs that said "No Cats Allowed" and people bought laser pens just to watch the furry critters go wild.
But there was another unintended side effect.
The Inuzuka clan declared a state of emergency, shouting that they were being overrun from furry abominations. Hana Inuzuka, the clan heir and who also went to the training session planned on her third birthday, had cornered Itachi with her three dogs, saying he wouldn't get away with this. They paraded their dogs around in public, carrying them and kids even riding the bigger ones.
It was now officially cats v. dogs. Inuzuka v. Uchiha
And then dog ears were a thing, shirts saying "I love my dogs" flew off the racks. She even thought she saw Kakashi wearing one of them, but she couldn't be sure. At their next play date, Sasuke had wrestled Kiba into submission, and Fugaku had patted him on the head.
It was when she had went to another multi-clan meeting when the clan heads came face-to-face. Tsume Inuzuka and Fugaku Uchiha locked eyes. Mikoto face palmed quietly. A hush fell across the room as the other clans waited to see who would move first.
The silence was broken by the clack of claws on tile.
Casually, a giant dog with an eye-patch walked in the middle of them, a cat summon riding on his back and licking her paw.
The clacks faded into the distance. Silence.
Then Tsume threw her head back and roared in laughter. The meeting went on as planned, Tsume and Fugaku throwing good-natured jabs at each other. And because Konoha was obsessed with anything cat or dog related, the news of the jockey dog spread to the corners of the Village.