Well, I mean, all the animals talk here, but their thoughts just aren't as complicated, I guess. Plus, it's just weird seeing horses and ponies so happy to act as steeds. Not to mention they don't really move the way us Equestrian ponies do.

[And to emphasize this, she crosses her forelegs like a human would cross their arms.]

It's like... I guess I'd compare it to hue-mans and monkeys. Similar, but there's obviously gonna be some communication problems.