Okay. Just try bringing this one in then to assess and treat it. If it won't settle down, see if bringing another buddy in helps it. I posted a couple of links that you can look at and try figure out what's wrong then fix it. I've fixed a few splayed legs and normally that only takes 2-3 days. Your bird I think has worse than that and may take longer.There's 3 siblings all doing great. It happened one night while in the coop with mom.