Dragon Posture

As you read Heron’s Bonds you will probably notice that the posture of  Brom and Griss are well described when they make their vows to Grabon after he promises them something they clearly find valuable. I am being cagey to keep from revealing details a reader might not have discovered yet. In any case, their posture has meaning. Dragons use foot, neck, back and wing position to mean very specific things. Can you crack the code?