[FONT=Verdana, Arial, Helvetica, sans-serif]That kind of does look like the tendon has slipped to the outside of the hock joint, but it's hard to tell[/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Can you feel the tendon moving over the joint (to the outside) as you bend the leg? If you can, then I'd say slipped tendon... and what you can try is taking a thin strip of medical tape or duct tape, (really thin strip like 16th" wide) and wrap it around the middle of the hock joint (like you'd be wrapping around the point and the crook of your elbow). A thin strip will support the tendon but not hinder the use of the joint. Make sure you wrap in the opposite direction that the tendon is slipping, to keep a little extra pressure on the tendon to help hold it in place. You want to wrap tight enough to hold the tendon in place, but not too tight that you cut off circulation on the leg. It's hard to do, and I'm not sure it will be much help on an older keet, but still worth a try. Good luck.[/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]Also it's a good idea to make sure they are in high protein starter feed.[/FONT]