Issue with IK leg rigging

I’m facing a problem while rigging a fantasy dragon I saw in an “Anime”,
I tried remaking the rig a couple of times but still the same problem …
The problem is That whenever i try making him walk , or even hold his leg up his legs get … Messed up
His knee like ,Thing keeps twitching and makes it Difficult or rather impossible to move.
Please help.
Model and rig attached if you want to take a closer look. :slight_smile:
Thanks in advance!.


EarthDragonBug.blend (2.82 MB)

The pop you see is coming from shin.R Curved Bone. Zero out the Curved setting, then poping stops. Try to get that spiral out of that bone.