Hi! I have an 8 year old daughter and boy/girl twin 6 year olds. I am writting in because my kids have been fighting a lot and gotten physical; pushing, hair grabbing, kicking sometimes even biting. It usually starts with some stupid agreement and quickly gets aggressive. What I have been doing is separating them immediately and making those involved go to bed an hour earlier. They are all very well behaved in school and on swim team, they have even all three gotten PYP awards (at their school kids get awarded for things like empathy, cooperation, team player, etc). They are so sweet and caring and kind to other kids but when it comes to their siblings they seem to get aggravated so easily. How can I turn this around? It has gotten so stressful for my husband and me. Thank you!