The following pilot report has been developed by ABC – National Anti-Bullying Research and Resource Centre (ABC) at Dublin City University arising from research conducted into the largely unrecognized phenomena of sibling bullying. Sibling bullying differs from normal family conflict. Like other forms of bullying it is a repeated, intentional, targeted, personal attack on someone who finds it hard to defend themselves. It can be verbal, physical, emotional, exclusion, and involve property. It is characterised by a real or perceived power difference between those who bully and those who are bullied. The primary motivation is to gain status, control and access to material or parental resources, achieved by dominating and disempowering a sibling. Often behaviours that would be easily recognised as bullying in other settings are interpreted within families as being merely sibling rivalry. However, sibling bullying goes beyond what is considered to be a normal dynamic between brothers and sisters.