There are a variety of synonyms for "most feathered" that can be used to add vibrancy to your writing. Some suggestions could include: "plumed," "fledged," "fluffy," "downy," "feathery," "fluffy-tailed," "fluffy-winged," "fringed," or "tufted." Each of these words captures different aspects of the beauty and texture of feathers. For instance, "plumed" suggests grandeur and elegance, while "feathery" evokes a delicate, shimmering lightness. By experimenting with different synonyms, you can enliven your writing and create more varied and vivid descriptions.