Sorry but I have not been on My Corgi for awhile. We just added a new 9 wk old pup to our family, a tri-color PWC girl!
Since your pup is already 6 months old, seems like that is time for her to stop the biting behavior! Has she been to any training? Finding a good trainer might be a good idea--one that uses positive reinforcement. Also, our breeder has some very good material about aggression/training/play/raising puppies on her website, and links to good articles. Take a look at her website: www.angelfire.com/id/castell/pwc/