Corgis are known for big, upright ears above their heads. As their ears develop, most will be floppy and gradually stand up around 6-10 weeks. The exact timing of this depends greatly on genetics, ear shape, texture, weight, and ear size. Around 12 weeks (3 months) if a corgi puppy's ears are not upright, I will generally recommend taping. This airs on the side of caution, as there are others that will wait until 16 weeks (4 months) before taping. However, I believe that if ears are not standing up by 20 weeks (5 months), the likelihood that they will stay floppy is high. Of course, corgis are lovable regardless if their ears are up or down. It is entirely up to you whether you decide to intervene or sit back. If you do decide to tape, below are basic instructions on how to tape a corgi's ear(s).