You can make a hobble out of one rubber band by knotting two leg loops to fit on the chick's "ankles", with enough band between the legs (about an inch) so the legs are held vertical.
The chick will figure out how to stand probably before the day is over, but you can assist it until it begins...
TREATING SPLAY LEGS STEP-BY-STEP:
Use a self-adhesive medical wrap to create the hobble for the splay-legged chick. ...
Cut two short pieces of the self-adhesive medical wrap (“Vetrap”) into one inch pieces. ...
Next cut approximately six inches of the proper width Vetrap to be used as the...