Look at those wings when they are folded. If the primaries fold outside the secondaries; it is a slipped wing. That's why the secondaries are curling. The primaries are rubbing the secondaries upward. I've tried to correct this in Silkies by taping, as I think you have, to no avail. You have to breed it out. Breeding birds, especially Silkies ,can be a case of"Chicken, or feathers" from year to year.unless it's an incomplete and they have it somewhere in their background, or would I be wrong on that. But I've never heard of a chicken having angle wing-- I have raised waterfowl and that is the word we use for an excess of protein in the diet that usually results in the angel wing, which can then be taped and corrected. On chickens, this is not a matter of taping wings and correcting them so could the same term be used for something that is not caused by excess of protein in the diet. I do realize the look is sort of similar, but waterfowl wings usually really stick out from the body and these wings I am dealing with still lay flat against the body, but the tips of the feathers do curl outward a bit. This is only on the secondaries, of course. Whatever it is, I'm very frustrated to be having this problem. Very interesting observation about how the cock throws opposite on the wings. My rooster has no obvious signs of this slip, they are just weak. I'm definitely not using him again, for sure, and I hope that will solve my problem when I also get rid of the grow outs that are showing this trait as well. Not all of his offspring have had this problem, but a good number of them have. That would also likely make them carriers of this gene somewhere, too (even though it is not expressed in them)...??? I wonder how that will play out as I get further on. Sigh.