Watership
Down, it's
Watership Down, a down is a rolling grassy slope in Britain, it has nothing to do with a direction, I WILL MAKE YOU SUFFER FOR THIS AND DESTROY ALL YOU HOLD DEAR.
....ahem. Anyway I really like the book.
You might enjoy
Fleeing the Forest, it's a pretty quick read also about rabbits with some obvious influences. Just don't read anything else by the author, none of it's about animals and its all painful anti-entertainment.
There's also
The Brave Polar Bears which is lying to teachers and does not belong in Family Friendly at all.
There used to be a couple of large stories about magic ponies that probably would've been right up your alley, but the author went full schizoid back in January and deleted them while rambling about secret Satanists. 🤷♀️