Don't take the bandaids off too soon! I hope she starts holding her self up on her own soon, and then give it a few more days.
I had one chick, a white crested polish, that started this problem well after most do, at about a week or maybe two. I think it was because she is a bantam chicken and I put her in with larger standard chicks which were already a week old, and she liked to get underneath them. When I noticed it, I tried the bandaid but took it off too soon, after about 3 days, so she reverted back to scooting around under the others, and one leg joint (hock?) even started turning out to the side. I put the bandaids back on, and looked again after a few days, but same problem, the leg was out to the side and she couldn't walk. Just the past few days I noticed her standing well with the bandaids, (she's now in with some silkie chicks) but was so afraid to take the bandaids off. I was dreading what I'd find. I finally took them off last night, and I was so happy to see her walk that I had tears in my eyes. That one leg still bends out to the side just a little more than it should, so I put the bandaids back on and will keep it on a few more days just to see if it helps, but I'm so happy she can walk again!
I also have a D'Uccle that at about 4 weeks just started this too, after doing fine the first few weeks, but she was unusually tiny and week when I got her, and had the skinniest toes I'd ever seen, and would get off balance if another chick just breathed on her! Some of the other chicks would even pick at her toes. She came from a hatchery and still had part of an unabsorbed egg sack on her belly. None of the others were like this. She was so young (I guess she hatched too soon) she couldn't drink well without strangling and once even choked till she passed out, but I held her upside down and rubbed her belly until she blew bubbles and came to. We named her TROUBLE, and she is still living up to that name! She's about 5 weeks old now, and now has the bandaids on, but so far, after about 5 days, isn't showing any progress. I'm waiting and hoping that she'll come around like the polish, but she's still a little small for her age, so I worry. We have gotten soooo attached to her, being "the runt" and all. She's very VERY tame and spoiled as you can imagine. Well, out of 48 chickens, I guess a few are going to have some problems.
I've got all my fingers and toes crossed for Trouble and for your little one as well.