Thanks guys!
I'm going to stick with Saturday's vet appointment. As is, I can handle Vinnie pretty well, but I've never tried to restrain him, much less trim his feathers. We're still building trust and I don't want to compromise that right now.
I will let the tech know your recommendations tho, about the next layer preventing further irritation. A very good point.
P.S. It's hard to tell from the photos, but the two outer-most feathers are also stripped the most, and they are longer than the other feathers, maybe by 1/3 inch. Do you still think they should trim all of them?
P.S.S. Oops I see now that last post was for Sasha

No way am I going to try to hold VinVin down for a wing trim, haha.
Thanks again!