
In my experience taping ears will only work on the mild cases, which would probably have sorted themselves anyway. Besides, like Brainless pointed out, hidden faults will turn up in later breeding, anyway. In young dogs the cartledge is still soft, it won't harden until the teething and growing is done. Keep massageing the ears, whenever you see them in the incorrect position, correct them with a gentel and quick massage. This might have to be done over and over again, for some time. In the end, this will help the ears "remember"

their right position, when it's time for them to harden .
If the ears then end up faulty anyway, it's just one of those things. Better one dog with floppy ears, than breeding a whole litter that has ears like propellers

;-) .
Best of luck,
Karen