I don't know parrots, but I know chickens. The sheaths are a normal part of a molt. Slow molts you might not notice anything except the debris from the sheaths and some extra feathers lying around.
The specks, now, they could possibly be mites or lice. On chickens, mites and lice congregate around the ears and the vent--especially the vent because of the moisture. You need the bird to be calm and willing, and you need to really get the feathers aside to see what's going on there. The specks might otherwise be part of the normal molting process, but it sounds suspicious. However, if the bird has had no contact with other birds, getting parasites is problematic and would cause me to lean towards a side effect of molting. But check anyway. It does sound suspicious.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
"Let me see you stripped down to the bone. Let me hear you speaking just for me."