In this kind of fanfiction, Naruto might have to deal with a whole new set of powers and instincts. He would likely struggle with the urge to consume human flesh, which is a huge contrast to his usual values. Maybe he'd try to find an alternative way to survive, like the vegetarian ghouls in Tokyo Ghoul. His ninja skills could also be combined with his new ghoul abilities in interesting ways, for example, using his enhanced strength and speed from being a ghoul in combat while still relying on his ninja techniques like shadow clones.
One potential storyline could be Naruto having to re - experience his early life with his new - found child self's perspective. He might struggle with the lack of strength he once had as an adult. For example, he could have trouble with basic ninja training again, but this time with the knowledge of his future self, which could lead to some interesting twists. Another could be how his relationships change. His friends might initially not recognize him and he has to prove his identity in a rather comical way. And also, the villains might underestimate him as a child, which could be a great advantage for Naruto to outwit them.
Well, in such a fanfiction, Naruto would probably be really cute as a baby. His friends might be super confused at first. Sasuke might be a bit less brooding towards baby Naruto. And Iruka-sensei would probably take on a more parental role, making sure baby Naruto is safe and cared for.
The villains in the Naruto universe could also play a role. Maybe the one who turned Naruto into a fox was an enemy seeking revenge or trying to gain some advantage. Orochimaru, for example, could be behind it, hoping to use Naruto's new form for his own evil experiments. And then Naruto, in his fox form, would have to fight against Orochimaru's minions to protect himself and his friends.
One possible plotline could be Naruto having to adapt to his new fox form and learning how to use its unique abilities. For example, he might discover that in fox form he has enhanced speed and stealth, and he has to figure out how to incorporate these into his fighting style.
Well, in such a fanfiction, Naruto would be super cute as a chibi. He might have trouble being taken seriously by his friends at first. His powerful jutsu could look really funny in a smaller form, like the Rasengan might be like a tiny spinning ball in his little hands.
One interesting plot could be Naruto, as a girl, having to deal with the different expectations of the ninja world towards females. For example, she might face challenges in being taken seriously in combat training at first. Another plot could involve Naruto's friends' reactions. Some might be really confused, while others could quickly accept and support 'her'.
Well, a plot development could be that Naruto, as a Kitsune, discovers a hidden Kitsune society within the Naruto world. This society has its own rules, hierarchies, and secrets. Naruto would have to navigate through this new world while still holding onto his values as a ninja. He could learn unique Kitsune techniques and magic that could be used to protect his village. And perhaps there's a prophecy in the Kitsune society that Naruto is meant to fulfill, which would add an element of destiny to the story.
Maybe the fox ninken was once a normal ninken that was experimented on by some rogue ninja. Naruto stumbles upon it and through his kind heart and determination, he helps the ninken control its new fox - like powers. They then train together and the ninken becomes an important part of Naruto's team, using its speed and stealth to gather intelligence.
Honestly, I haven't read a particular 'naruto gets fox tails' fanfiction that I can single out. However, when you search for it, look for ones with high ratings and a lot of reviews. Those are usually the better ones. Also, pay attention to the author's writing style. If you like detailed descriptions and character development, find a fanfiction that seems to focus on those aspects while still having the 'naruto gets fox tails' concept.