thanks everyone for all the info. I dont think its lice or mites a I can't see anything and they've been dipped, its been flying nearly everyday since it took to the wing, even doing an hour and a half yesterday. Its had a couple of baths since and thats definetly helped the wing feathers. It always had good seed, corn + thepax so hopefully a good rest, + some vits and it will moult out.
All the Best