I dry the feet as may tom does. You can also dry them standing up as if the bird was walking or curl the toes and make the last act of defiance jesture.
Or if I am saving the spurs I cut immediately and drop them in a tub of simple Borax. 50 mule team borax works well.
I also use various legs for hands on demos at the Learn To Hunt programs I teach with the state.
Or a series of cut spurs on a leather strand makes a great hat band.
JW