Runt w/ Limp

We stepped our flock size up a bit this year and I've been fortunate to have no maladies (unless you want to call stray dogs a plague) until this season. Picked up 30 3-week assorted breed chicks and this little runt was in with them. The lady I got them from said the sire was a single brahma, and she had all sorts on her pasture. This one was small, she doesn't seem to be growing as fast as her sisters. I moved her into this container with the next smallest chick because she was getting trampled andnkept back from feed, and now I'm noticing she's got a limp. I didn't know if this looked like an injury that I just need to tape/splint, or if this has any telltale signs I'm not used to seeing of missing nutrition. My wife said she couldn't be certain but that she thinks that this one has always had the wobbly gait. In any case, any insight would be very welcome.