Fantasy
Animal speech works best when the animals are still animals.
A bird that can gossip about the weather is one thing. A bird that turns into a tiny oracle with perfect moral clarity gets old very fast. Same with horses, rats, foxes, any of them. They should have their own limits, loyalties and blind spots. A horse notices routes, fear, weather, routine. A rat notices food, danger, gaps in walls. Neither needs to be a wise counsellor in fur.
The useful version is usually messier. Less “here is the truth”, more “here is what this creature noticed, and what it very much did not.”
A bird that can gossip about the weather is one thing. A bird that turns into a tiny oracle with perfect moral clarity gets old very fast. Same with horses, rats, foxes, any of them. They should have their own limits, loyalties and blind spots. A horse notices routes, fear, weather, routine. A rat notices food, danger, gaps in walls. Neither needs to be a wise counsellor in fur.
The useful version is usually messier. Less “here is the truth”, more “here is what this creature noticed, and what it very much did not.”