
Hi, You didn't say how old your Crested is? If she's a puppy it may be that she is teething and her ears will be all over the place for a while. If she's an adult....well, sometimes they do have trouble with their ears. If she has a lot of fringes on her ears then clipping them off will reduce the weight her ears have to take. This is more common than most people think. The Powderpuffs can have dropped ears so it's in the genes anyway. Is she hairless as in hairless? Or a hairy hairless? I know this might seem a bit confusing but loads of hairless crested have body hair and heavy fringes in their head and ears. If none of the above applies you should check for ear mites/infections and pluck the hair out from inside the ears (actually IN the ear cavity). Plucking has the effect of increasing the blood flow to the ears which can sometimes make them stand up.
Debs