A splayed leg is fairly easy to identify, the leg slips out to the side like the keet is doing the splits. Usually the result of injury from slipping on bedding that does not have enough traction or from being on a slippery surface like newspaper, which should never be used for any baby poultry as bedding IMO. Sometimes a splayed leg, (or both legs) can be caused from other keets piling on top of one the keets too (too much weight is put on the the keets legs) and the joint ends up getting stretched out, allowing the leg to splay out. It just gets worse if the legs aren't braced up and held in the correct position for at least a few days.
Other conditions like rotated femur, where the whole leg turns out from the hip is usually a congenital abnormality, (they hatch with the defect it's not from an injury), and another leg issue called slipped tendon is where you can actually see that the tendon does not stay in the groove on the back of the knee hock area when the joint is bent. As I mentioned, splayed leg is fairly easily corrected if caught early enough, but there is not a reliable fix for rotated femur, (other than surgery by a vet and even then it's not guaranteed). It's painful for the keet and the pain worsens as the keet grows and gains weight. Usually keets with rotated femurs are better off if they are put down humanely. A slipped tendon can sometimes be fixed with a very thin strip of tape wrapped around the center of the hock joint to hold the tendon in place and let it heal, but still allow the keet to use the leg. It's not always possible to fix this, but some do have success with it, especially when vitamins are added to the keet's diet (usually to their water) in case it was caused by a nutritional deficiency. There area few other methods used to correct a slipped tendon, but I've never tried them.
