She's a hen for me without a doubt, her face just screams hen, I know most people don't go by the face when determining gender but hens do seem to have a softer gentler expression as for the feathers the photos show no evidence of any hackle or saddle feathers, any bright shiny new feathers coming in are just the new feathers that she is producing from her transition from chick to adult these will be brighter and shinier, her stance in the photos is also very hen like.