coupled with the greater difference in the amount of
time that a GS2 duck spent supporting itself on its right
versus left foot as it moved forward indicate that poor
gait was associated with a pronouncedly uneven walk
or limp. These results suggest that the “reluctance to
walk”, which defines a GS2, is due to a progression of
the walking problems associated with a GS1, a labored
walk or slight limp.