Remember though, you can't just tape them, without shaving them.
The whole idea is to eleviate the weight on them and then tape them-the tape will adhere much better to the skin this way also.
And as far as his siblings ears being up before and longer than your little guy's, don't worry. The leather of his ears simply may be thicker and heavier that his siblings...but shaving them and possibly taping them should give you better odds at getting them up.
AND THE HAIR GROWS BACK FAST!
