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 stop? 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 Start. Vanessa explains why siblings may fight, and what you can do about it.