Their teens have have become enemies. What can they do?

Their teens have have become enemies. What can they do?

“We have girls who are 13 and 14 and over the past year they’ve become out of control. They’re constantly fighting with each other, picking fights over anything and everything and this has even carried over to the bus and in school. They used to be best friends and now it’s turned into complete chaos at home. I feel like we’ve tried everything. Do any parents have advice for us?”