The calcium is probably going to the their teeth which might be why her ears are still floppy. But then, some stay floppy... As Wylie's mom suggested, you can tape the ears and/or shave the hair behind the ears to help lift the "weight". I think those two are the most common suggestions I've seen.
Personally, I think floppy ears are just as adorable and have their own charm.
My teapot has half floppy ears and my runt has perky ears. Love both their looks!