Lil miss is a biter..
She also bites in her sleep...well she falls asleep on the boob sometimes, her jaw locks and her teeth clamp down... the last time it happened there was blood everywhere, on my bra, in her mouth, on her face....
I laugh now but at the time it bloody hurt and I was in tears... It also felt like I was back in the newborn days with the next few feeds it hurt so much.
Usually I find that lil miss goes through phases of biting and its always accompanied by the appearance of a tooth. Have you noticed that Cally maybe teething, or showing signs of teething? Perhaps give her a small dose of calpol.
When Lil miss bites I usually shout NO BITING!... (because it hurts) and I immediately put lil miss on the floor. She comes back and whinges and cries... but I won't feed her for at least half an hour... and when I put her back on she doesn't bite... well mainly
I have heard other tricks which include tapping them on the nose when they bite... or when they bite pushing their heads into your boob so their nose is covered and they can't breath.. but I have always found them to be a bit extreme...
I have a question for you though beanie... did Seren turn into a toddler who bites? Lil miss has taken to just biting people now when she can't get her own way, or your not paying attention to her.. and as shes a booby biter... I wonder if shes going to be a "biter" and how to nip it in the bud now.