Peachick with droopy wind

[DukesDucks]

Looking for advice for a 2 week old peachick. One wing is drooping. Otherwise it is active, eating, doing all the things it should be doing. It is with 2 other peachicks and it is tough to get a good picture so I hope these are clear enough. Excuse the mess. They are in a temporary space while I clean brooder space.

 

[KsKingBee]

Normal. The wings are growing lots of feathers and are heavy, the wing muscles are still developing and not strong enough to hold the wings up.

 

[DukesDucks]

Thank you. That is what I had thought after researching here. I wanted to make sure it is healthy before posting for sale.