I had a similar leg issue w a chick 2 yrs ago. Splinting didn’t seem to help. That leg was a huge hindrance, dragging behind as it got bigger, and making it harder and harder to get around. I finally culled it at 3 weeks.
This was a chick who couldn’t hatch without help, I kind of wish I hadn’t assisted.
This was a chick who couldn’t hatch without help, I kind of wish I hadn’t assisted.