My yorkie, Gizmo is 16wks old and his ears arent up yet. I did read in some websites that most are standing by 3months but it will be iffy after 6months. They also may never stand. I decided to start working on it since hes still below 6months and I did trim the top of his ears and then taped them. I only left it on for 2days although they say longer but just to see what the status was. I was truly amazed that they did stand up but it only lasted that 1day. I'am currently giving his ears a rest and am gonna retape tom and this time for atleast 5days. I'm just afraid he'll get an infection or something. Heres the website...theres 3 different links for the ear taping for yorkies.
http://members.cox.net/jrogan/ears.html http://members.aol.com/CYorkie/TapingEars.html http://glassyorkies.homestead.com/care.html
I ended up using masking tape...the johnson one really didnt do anything for mine, his ears still drooped but with the maskin tape they were straight up. Although they are back down now they are perkier than they were before I taped them for the 2days. Well worth it and I look forward to trying again for a longer period.
Goodluck!