I do not agree with inflicting physical punishment on kids - BUT - I do agree on this one, all my three children bit once - I bit them all back and none of them ever did it again.
the child is one year old and youre telling a parent to bite her ??!!!!!!!
this is called child abuse where i come from ie Britain.
I would NEVER, EVER advocate biting a child for whatever reason. The biting will wear off, instead of biting her try removing her from her sister and be extra vigilant when they are together. Occupy her mind with something else to chew instead, at the age of one she is not aware of going out to "bite" someone.
I understand what the above comments is saying as i too disagree with 'abuse' to a child and would never hit my little girl but last week she bit me out of agression and marked me (she is almost one) so i bit the fleshy part of her leg enough for her to feel it but not to cause pain and certainly not mark her i then walked away she was shocked that it had hurt and cried for a min or two then came to me for a cuddle. I gave her a hug and told her that it hurts to bite and is naughty. She has not done it again!!
Before a baby can talk they get so frustrated because they cant say what they want or think, i read in a baby book to say to your baby i understand you are feeling frustrated because you dont want your nappy changed/ you want that toy/ you dont want to get dress etc but ....and then explain the reason why.
I know it sounds silly but it really has worked for me i dont know if its because your are speaking in a calm voice or what but its great, anything is worth a try with an angry baby!!
My 5 yr old used to bite her 9 yr old sister so one day she did it so hard that she drew blood, well the 9 yr old grabbed her and bit her so hard she also drew blood, the 5 yr old has never bitten her again and has since learned her lesson.