Her feathers are as weirdly soft as her fur -- unlike Twilight's familiar, could-use-a-brush fur, and Celestia's 'Peak Pony' fur, Luna's didn't quite feel like the fur of the ponies he's come to understand in this land. It was incredibly soft, in an almost silken way, despite being trimmed shorter than her sister kept it. In contrast, her 'pockets' of fluff were more exaggerated, with more chest and neck fluff, and so on.