4 Select the lower neck link, Bip01 Neck, then click Set Key
to set a key for it as well.
5 Shift+drag the neck key to copy it to frames 11 and 25, as you did for the
head.
You’ve now set up a reference pose about which other head poses can
move. Head movement is secondary motion. It’s called “secondary” because
the walk doesn’t depend on it, and it doesn’t affect the leg or body
motion. However, secondary motion can add a great deal of life to an
animation.
6 Go to frame 7. Make sure Auto Key is on, then rotate
the neck and head upward slightly.
The idea is that in general, the dog looks where it is going when it’s
forelegs are in the Contact position.7 Shift+drag the new key to copy it to frame 19.
Animating a Quadruped Walk | 1025