How many feathers are in a Sioux war bonnet?

Between one and all; feathers. What a 'war bonnet' means, how it is created (who creates it), and things of this nature is very complicated; the number of feathers is a direct result of the action(s) taken by the man who wears it. Also, how the feathers are wrapped, attached, adorned; what kind of feathers are used as well as the angle they are put at all mean something.