Well, it could be about the Naruto characters having animal-like abilities or forms. Maybe Naruto himself could turn into a fox, like his Nine - Tails chakra form but more animal - like. And other characters might also have similar animal transformations based on their own unique traits.
I think Hinata would be a main character too. If she was an animal, she might be a little rabbit, shy but with hidden strength. Her love for Naruto could be shown in different ways as an animal. And Shikamaru, as a sloth - like animal, could use his intelligence to solve problems in this new animal - filled Naruto world. Gaara, with his connection to the sand, could be a desert - dwelling animal like a scorpion, adding a new dimension to his character.
I'm not sure. It depends on the specific context and the creator's intentions. Sometimes stories are inspired by real events but have fictional elements added.
Honestly, I have no idea. There's not much information readily available. You might want to check with official sources or dedicated fan communities for a definite answer.
Most likely not. Many such stories are works of imagination and not based on actual facts. Alice Darling might have elements inspired by real life, but it's not a true account of something that happened exactly as presented.