Scared chin

So I have had Chin 1 (Pepper (F)) for around 3 years, she is a rescue so I have very little information about her - I assume she is between 5 and 8 years old. I bought Chin 2 (Scout (F)) because Pepper seemed a bit lonely. Since then I have tried to bond them with Neutral play zone/cage next to cage methods but Pepper is not receptive. Pepper is very scared of Scout and tries to attack her through the bars of the cage/urine sprays/won’t fall asleep if she can’t see her/alarm calls/guards the...

Scared chin