http://pluggedinparents.com/articles-safety/714-sibling-abuse
Allowing yourself to explore what sibling abuse looks like can help you recognize a pattern in your own family or with one of your child’s friends. The reality is that sibling abuse is very harmful and has lasting effects, but just like any other abuse help is available. Realizing your child is abusive toward their siblings does not mean that your family will get torn apart. The benefit of being aware of such things is that if it happens to your family you can undo some of the damage long before it gets worse.