Biting - advie needed please

[thesockmonsterofdoom]

dd2 has bitten dd1 twice today, once on her nose and once on her thumb, she has left a mark both times and actually drawn blood on her thumb.
Thing is dd1 winds her up and up and up until she snaps. I have put her in time out both times but not sure it has really had any affect.
What do you do about biters? It seems so much more of a misdemeaner than anything they normally do and I really dont want it to happen again.

Bumping for you.

Hmm - this is a difficult one. Nearly 30 years ago, my dd1,(about 18 months at the time) who was in a supermarket trolley seat, bit a child in a neighbouring trolley seat really, really hard. She drew blood. A LOT of it. It was FLOWING and running onto the floor of the supermarket, I shit you not. I was so horrified that I bit my dd1 as a knee-jerk reaction. I can't believe I am admitting this. (But 30 years ago, you were allowed to do such things) It wasn't that hard and didn't leave a mark, but it frightened her. All the old biddies in the queue clapped and cheered me. The younger folks vilified me. I slunk out leaving my much-needed shopping and ran for home.
DD1 never bit again and has grown up just fine.
I would never do this now with my second brood - am really anti the physical stuff - we all grow and change.
To get back to the biting - what worked was teaching the consequences of biting. Maybe making a body part (nose/thumb/anything biteable)out of playdough and pretending it belongs to a person/sister and then getting the biter to bite it and have a look at it, look at the teethmarks - "what would that feel like/lets make a story about this" etc, etc.
Maybe it might help.

we did end up with her biting her dolly, I aid if she had to bite something then it wasnt to be her sister. I wonder if her teeth are hurting, she is getting her last tooth at the moment.
I must admit I really dont know how to handle it. May ask at nursery if they have any advice.
thanks.