There is nothing quite as frustrating as trying to mediate a fight between siblings about the ownership of some random piece of plastic, or because one of them breathed on the other. If you were a sibling yourself you might remember fighting this way with your own brother or sister. But how did our parents make it ? And are we even able to apply the same methods they used today? Dr Vanessa Lapointe is a psychologist and the author of Parenting Right From The StartVanessa explains why siblings may fight, and what you can do about it.stop.