First time chick owner- frizzle with spraddle or dislocated leg?

[srk5028]

My family incubated/hatched eggs for the first time as an Easter surprise and ended up with 2 chicks who quickly became wild looking and I learned are “frizzles”. They are 4 weeks old and still in the brooder with time outside during nice weather. 5 days ago they were outside in the coop for an hour or so and when I brought them back in one (Eagle) seemed to be having a bit of trouble walking. Nothing in the coop I could see to cause injury. Their brooder has wood shavings and in the coop it’s just grass. I researched and thought possibly spraddle leg, and they have been getting electrolytes and rooster booster since. I attempted to use vet wrap unsuccessfully to bind 2 legs together (wouldn’t stick) and also did the cup therapy. I can’t see any signs of blatant injury but the left leg sticks straight out towards his/her head making walking impossible. He/she can sit up if propped but flops if they try to move around. Eating/drinking/making all the normal sounds, feisty as ever. Today I fashioned a makeshift sling and they tolerated it so well with the occasional attempt at escape. When I took them out they did seem a little stronger with standing and wanting to move around but still flopping unable to support on the leg. Could this be a dislocation? If so, what else can I do to assist with healing other than the sling during the day? I hadn’t separated the siblings until today because they are close and don’t like to be apart but I do have them separate now just to ensure no accidental injury from the sibling (crayon). Any assistance/guidance is greatly appreciated- they have quickly become our babies and want to do everything to heal him/her. Thank you so much!