I've had Fiona now for 3 months. She is very laid back, friendly but likes her private space. She has free roam in house but does not venture out of her space much. We think she may have been raised in a cage and is not comfortable exploring. She is about 2 years old. Recently we got a new bunny who we haven't named yet but we will call her Tabitha for now. She is 4 months old and was recently spayed. We have been bonding slowly over the past 4 weeks and things have been going great. I moved them into a shared pen 2 days ago and they are doing great. Tabitha is very outgoing, curious, into everything. She is high energy, loves attention, follows us around the hours, loves treats and handouts of whatever I am cooking... much like a toddler. I am keen to allow her plenty of time outside her pen for exercise. Last night we were watching TV in our room with my 9 year old and she and our little dog were playing, nothing out of the ordinary. Tabitha seemingly joined in the fun but next thing I know she is lunging at my daughter and every time she moved away Tabitha kept coming for her, bit her 3 or 4 times. She has done this once or twice to my younger daughter as well. Let me be clear, my kids are very kind and loving towards our bunnies. They do not harass them or be rough with them. In fact, they mostly leave them alone. Any thoughts on why she might be nipping at my kids and how to correct it? Thanks everyone!