Is the white duck the one you are concerned about? that looks like it may be just heavy wings that they need to develop muscle to hold up. Is she constantly adjusting? Droopy wings at this age are pretty normal, especially with the large duck breeds. Once they work those muscles they should hold them normally. I saw this with my Muscovy drakes they would adjust then the wing would drop down again then they would bring it back up to normal position finally the muscles are strong enough to hold them normally.
Can you get a picture of the Swedish from behind so we can see how the wing is laying?