No. In the Harry Potter series, there are no stories about animal slaves. The series is centered around themes like magic education, family, and the struggle against Voldemort. Magical creatures are integral to the world - building, but they are not slaves. For example, the relationship between wizards and phoenixes is one of mutual respect, not of slavery.
Yes. In the Harry Potter series, there are many elements related to animals. For example, Harry's owl Hedwig, and the Animagus ability which allows wizards to transform into animals. So it can be considered part of animal fanfiction to some extent.
I'm not sure there is an official 'Harry Potter Animal Slave Story' in the main Harry Potter canon. It might be a very unethical and non - existent or fan - made concept that goes against the general values of the series. The main series promotes friendship with magical creatures, not enslaving them.
It's a rather specific combination, so it might be hard to find widely popular ones. But some fanfiction authors might have created stories where an animal character has a connection to lemons in the context of the Harry Potter universe. Maybe there's a story where a lemon - colored magical bird helps Harry Potter find a hidden path in the Forbidden Forest, and the bird's behavior is related to the properties of lemons in that fictional world.
Hippogriffs are popular as well. Their majestic appearance and the fact that they require respect to interact with make for interesting stories. Fanfictions might explore a young wizard's journey to tame a hippogriff and the bond that forms between them. There could be a story where a hippogriff is wrongly accused of attacking a wizard, and the main character has to prove its innocence.
One possible plot could be that Harry is turned into an animal, like a stag, which is his Patronus. He then has to navigate the wizarding world in this new form. He might use his animal instincts to discover hidden secrets or evade his enemies. For example, he could sneak into places unnoticed as an animal, which he couldn't do as a human. He might also communicate with other magical animals in a way he never could before, and they could help him on his quests.
Well, it could be really interesting. For example, if Harry was replaced with a cat. The cat could have special powers like being able to see things that are hidden from normal view. It could slink around Hogwarts, getting into all sorts of nooks and crannies that a human Harry couldn't. And the way it would interact with other characters would be different too. Hermione might be constantly trying to keep the cat - Harry out of trouble, while Ron might find the cat's antics both annoying and endearing.
I'm not sure there are many 'good' ones in the sense of being proper, as 'lemon' often implies inappropriate or adult - themed content which is not in line with the general spirit of Harry Potter. However, if you mean stories with a citrus - like element (unlikely but taking it literally) and animal characters in the HP universe, you might have to search through some very niche fanfiction sites.
One great fanfic could be 'Harry's Animal Form Adventures'. In this, Harry turns into a stag, just like his Patronus. It has really interesting scenes where he uses his new form to explore the Forbidden Forest in ways he couldn't as a human. Another is 'The Animagus Harry', where he discovers his ability to turn into different animals depending on his emotions. For example, when he's angry, he turns into a small but fierce badger.
One common theme is self - discovery. Just like in the original Harry Potter series, characters often find out more about themselves through their interactions with their spirit animals. For example, they might learn about their hidden strengths or fears.