LoneStarBirds
Chirping
Hello, she is just lovely!
If anyone is curious about the dark spots my lavender hen was shedding, here is a video. It's not the feather casing, but whatever dark material is inside the feather casing.
What you are seeing is the dried remains of what was once the blood supply to the developing feather. I have always referred to it as the aftershaft. I have large macaws and on them the aftershaft is quite large on their tail feathers. If you have a large piece look at it under a magnifying glass and looks kind of like scaffolding.