I have a one year old yorkie. I had a problem with her ears standing up because I didnt get them tipped after she started teething and when I started to they wouldnt stand up.
Then I took her to her groomer about two months ago. And they tipped her ears. They shaved them farther down than the groomer did...Much farther down, to like the center of her ear. And now they stand. ALL the time. THEY always stand unless she puts them down!! OMG! Isnt that awesome! I thought they would never stand.