4 day old chick with injured leg

[Birdmama2020]

Hello I'm hoping I can get some help/advice on how to help my little chick.
The chick has been fine up until today all of a sudden it can't stand. It won't put weight on its one leg and keeps pecking at it. I brought it in for a closer look and it seems to have a cut/injury in behind its leg. I cleaned it and used iodine gental spray and some vetericyn. Now I'm not sure what to do. Should I leave it as is and keep an eye on it and keep it clean and gently move it? Or should I wrap it? I'm not sure if it's just a cut and sore or if it's broke or sprained etc..
Pics below

Thank you for you help!

 

[Eggcessive]

I would leave it open and continue to clean it. Was the chick walking normally up to now? Is the chick with same age chicks? Is there anything sharp (wire or a feeder, etc) in the brooder? Could the chick have fallen from something? Make sure that it can reach food and water, and that no others can peck at the wound. A chicken sling might be helpful.

 

[Eggcessive]

Here is a link for examples of chicken slings for periods throughout the day, alternated with letting it lie down to sleep:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/