Poor Bella...Mitzi gives her no peace. She jumps on her, chases her and generally annoys the hell out of her sister until Bella turns around and gives Mitzi a cuff across the ear. Bella is really the most patient cat, especially with Mitzi who, due to her traumatic start in life, has never really learnt to socialise and, of course, she is younger than Bella, too. So, occasionally I have to intervene and tell Mitzi to leave Bella alone. She usually gets the message.