Weird wing growth on Orpington chick?

[Thorn_shrike]

I have a 2-week-old chick that is the lone survivor of a mass death event from being in transit for too long. Now it's with a 6 chick flock of 1-week-old chicks from Agway. All are buff orps. 2 week survivor chick is the same size as week old chicks (I attribute this to its spending a week just trying desperately to stay alive) but it also has very small vestigial-looking wings compared to the Agway chicks, who have large feathered wings that look like they are actually meant for flying. I'm guessing the different hatcheries are making buffs of different qualities?

Has your chick with the small wings caught up in wing size and feathering, or are they still smaller?

In the first pic, small wings is in the back. 2nd and 3rd pic is small wings. Last two pics are of the one with loose feathering. These pics were taken over a week ago, they look even more grown up now