Joanna Fortune: My young daughters have started to fight with each other 

"As each child grows and develops, their needs change, significantly impacting how they feel about each other at different ages and stages."

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Joanna Fortune

CHILD PSYCHOTHERAPIST

I've two girls aged five and eight. They were great friends when they were younger but in the past year, they have started to fight with each other, sometimes I have to pull them apart. I've told them this behaviour is unacceptable and have taken away treats as a punishment but this seems to make little difference. What would you suggest?