We had some building work done and things are starting to settle down but our female cat has decided the house is hers and chases her brother away now. He is a bit timid and now is refusing to come inside but hangs out in the garden with what DH describes as a sad face. He is desperate for fuss whenever we are outside and is still eating in the garage just not coming into the house. They are 3 year old rescues brother and sister. Is there hope? I feel really sad for him being pushed out. My sister has offered to have the girl cat as she loves her and is catless. Is separation the only way forward or do you think their relationship might resolve itself?