[COLOR=4B0082]Was hoping the chick had improved and was zipping around the brooder tripping over it's hobble/brace, by now. I hate being the barer of bad news [/COLOR]:/
[COLOR=4B0082]Judging by how the[/COLOR][COLOR=4B0082] entire[/COLOR] [COLOR=4B0082]leg looks twisted to me, my suspicion is a rotated femur (which is a deformity, not an injury).[/COLOR]
[COLOR=4B0082]While I am far from a hatching expert, I have incubated a lot of eggs (Guinea, Turkey, Quail, Silkie), hatched out well over 1700 birds... so I've run the gamut of incubator issues and hatcher injuries etc but IME with splayed leg (or legs), the leg doesn't turn out from the body. Normally splayed legs are the result of an injury cause by slipping/poor footing which results in a wobbled out/stretched out joint socket that lets the leg slide out from under the body to the side, no rotation of the entire leg is involved. Usually within a couple hours of being braced/hobbled (and the chick or keet has gotten used to the hobble) the leg is used normally, with no favoring, no pain. [/COLOR]
[COLOR=4B0082]You mentioned slipped tendon, and the tendon not budging when you tried to move it... I can definitely see in your pics that the tendon on that leg is not in the correct position over the back of the hock. If it was a slipped tendon it would be easily moved back into the tendon groove (but would probably slip right back out as soon as the leg was bent), which with my suspicion of a rotated femur would be a resulting deformity that occurred during development while still in the egg (not from an injury after hatching).[/COLOR]
[COLOR=4B0082]The chick is most likely not grasping with that foot because the femur rotation and tendon deformity are causing it considerable pain. Hopefully I am wrong, but as I mentioned splayed leg is a pretty quick fix if noticed and the legs are braced/hobbled soon enough... which IMO you did.[/COLOR]