She's probably still hurting. Could she have some invisible internal injuries? If so she might not make it. Sorry, hopefully it's only an eye and leg problem.
I wouldn't give her a companion, it would probably only cause further stress. Force feeding would be extremely stressful and might damage the already broken limb further, but eventually it might be necessary. Maybe she's having trouble seeing the food or moving to get it. Or she could be scared of you.
I don't know whether it would be a good idea to try a splint. Maybe someone else can tell you.