Our daughter is 2 years 5 months old & is my 4th child (5th between us). Despite our extensive parenting experience (my eldest is 19!) we are at the end of our tether with her behaviour. She has daily violent tantrums that last over an hour at times, regularly screams for up to 2 hours in the middle of the night & nothing will pacify her. She hits & scratches us, her siblings & s couple of times othe children at nursery. We have never hit her & rarely raise our voices & have tried all tactics such as ignoring, comforting & the naughty corner for violence. She throws food & cutlery & toys at her sister, pulls her sister's hair & refuses to cooperate with pretty much everything. Luckily her next oldest siibling is 7 & is extremely patient & never retaliates. Her health & development are otherwise normal. We are in a negative spiral & are exhausted! Help!!!