I would leave the nail until you talk to your rabbit-savvy vet that way you don't cause any more damage to the nail. And if she pulls the rest of it off then you will need to put some corn starch on it if you have it to stop the bleeding, If you don't have any then you will have to take a washcloth and apply pressure if you cannot get it to stop then she needs to be taken to an emergency vet right away, at that point it wouldn't matter if the vet was rabbit savvy or not as long as they can get the bleeding to stop long enough for you to take her to your rabbit-savvy vet. I'm not trying to freak you out or anything but a just in case kinda thing.