[yorkiefan_]

Does your pup have lots of chew toys? If not, she needs them ASAP for her teething. When she bites at you correct her and give her a chew toy, then praise when she goes to town on the toy. Another thing I did was show dominance over her by holding her on her back to calm her back when she was biting hard. She still play-bites with me now when excited, but it's more like the kind of play bites you see them giving littermates as opposed to when she was going way too far before (she drew a pretty good amount of blood on my nose twice when we were playing, so the dominating was a must for me; maybe it's not at that stage with you though). I think part of the reason she play-bites with me (and no one else) is that we run and chase each other around a lot, so that must trigger some of that hunting instinct she was born with.