It depends on what you want.  If you want her ears to stand up than by all means tape them if not then I wouldn't worry too much about it.   
I have one of each.  Mollie's ears are about 3/4 of the way up and Wyatt's is still all ears.  I never had to tape his.  I did shave them however but only because They started to stand up by themselves when he was a few months old.        |