What type of sock? Maybe try one that is smaller? The fabric on mine was like tights and it was tight on the duck, but I could still get my fingers under it. When it was too long, the sock made him roll around like a bowling pin. I only had it on for 24 hours straight before he managed to get out of it. My drake is big since he is muscovy. I wasn't able to get a pic though. Basically both ends of the sock was cut off to make a tube. You want the tube to fit snuggly over their body. Vet tape won't stick to hair or feathers. It is a self stick tape.
You just have to keep at it if you want the feathers corrected.