Pretty slim. Most Naruto fanfics revolve around Naruto's adventures, his training, and his relationships in a more traditional sense. This kind of fanfic goes against the general tone and themes of the Naruto series, so it's not likely to be common.
There could be some very out - of - the - box fanfics in the Naruto fandom, but this 'Kyuubi breast feeds Naruto' idea is not something that is typically seen in mainstream or even most of the niche fanfics. Fanfic writers usually draw inspiration from the original story's themes of friendship, determination, and the ninja way. This concept seems to deviate quite a bit from those common themes, but it's not impossible that some extremely creative or perhaps misdirected writer might have attempted something like it.
Very low. The concept itself is quite strange and not something that would typically be part of a family - friendly Naruto fanfic. Fanfics usually aim to enhance the positive aspects of the original story, like Naruto's heroism or his bonds with others.
One great example could be a story where Fem Kyuubi shares her ancient knowledge with Naruto, helping him in his training. This could lead to Naruto developing new and unique jutsu.
The chances are probably quite low. This is a very specific and rather unorthodox concept that might not be very popular among fanfiction writers. Most fanfictions tend to focus on more common themes like character development, new adventures, or different relationships within the bounds of the original story's feel.
The chances given in Naruto fanfic often relate to character development. If a character is initially weak, the chance of them becoming strong through training or some special encounter is a common theme. It could be like a 50 - 50 chance in some fanfics whether a secondary character gets a significant role upgrade. In others, the chance of a long - lost relative of a main character showing up is quite high, depending on the type of fanfic, like those that focus on family secrets.
Well, it can change the power dynamics. Naruto already has a lot of power, but with Fem Kyuubi feeding him, he could become even stronger, perhaps overpowered in some fanfictions. This might lead to new enemies emerging to challenge this new level of power.
No. In the Naruto series, Naruto is the host of the Kyuubi, not its slave. Fanfics might deviate from the original concept, but in the official story, Naruto has a symbiotic relationship with the Kyuubi. He gains power from it and eventually befriends the Kyuubi spirit.
It is not a proper fanfic. Fanfiction is a form of creative writing that builds on existing fictional universes. But when the title includes elements that are inappropriate and objectifying, it goes against the spirit of fanfic writing. It should be about exploring the lore, the relationships between characters in a respectful and positive way.
Well, Kyuubi might be possessive of Naruto because they have a unique bond. Kyuubi has been inside Naruto for a long time. They've shared experiences, and Kyuubi may see Naruto as its own in a way. Also, Naruto has sort of tamed Kyuubi to an extent, and this might make Kyuubi feel like Naruto is special to it, so it shows possessiveness.
One great Fem Naruto Kyuubi fanfic is 'The Nine - Tailed Fox's New Host'. It explores how a female Naruto deals with the power of the Kyuubi in a unique way. The story focuses on her training and how she overcomes various challenges with the help of the Kyuubi's power.