i know a fair amount of exhibitors that used to glue there dogs ears usually with bostick,to encourage the ear to break over properly personally i don't think it makes much differance.
lots of breed where ear carriage is important, the ears either fly or fold wrongly during teething. so taping or glueing the outer edge only is used to hold the position till teething finishes. Completely pain/discomfort free, nothing like the dressing done on cropped ears. bye Gwen