Moving parent by moving a child To help myself with rigging my dinosaur properly i downloaded a nice, professional  dino with a nice rig. I found out in it the thing i don't understand. There's a parent-child chain: chest -&gt; neck -&gt; head -&gt; jaw and there's no bone constraints on any of those bones... and somehow you move the head and the neck follows. It works like IK and it's very smooth and it's comfortable but i have no idea how it's done, despite of having the .blend file.
My question is: how to do this?
Hey that took me awhile because I'm also used to looking for bone constraints. I guess the file creator got lazy and just used auto IK in the tool shelf. It is just a check box enabled.

Here is a screen shot of the option.