Toby was the name of our first chi, he was 15 years old when we got Sully but he hated her and she loved him, he would face the wall and just ignore her mostly or just kept moving away from her but in the end they got used to each other and would share a basket, sadly 6 months later Toby died of old age but they were friends by then, just persevere,give him lots of attention hes feeling jealous and dont force her on him and give Toby his space, im sure he will come round in the end.