Usually up until around 6 mos. if they're not up by then, they probably won't come up..I taped my shepherds ears when she was around 4 mos. but, it was hurting her, and the thing my breeder put in her ear was coming out around the tape and I was about to gag...I said enough is enough, so, I had the breeder come back over, as when I tried taking the tape off, i could tell it was hurting her, so
now it's one up and one down..here's her pic
http://alpha-dog.org/images/Medium%2..._&_Kasey_1.JPG