I broke down a week ago and brought home this stray/feral cat I was caring for bc I think she was in danger. I'm trying to introduce her to my 2 cats but I'm scared to! I'm basically keeping them in bedroom and her in bathroom. I open one door for a few hours and vice versa. She's SLOWLY making her way closer to me in the living room but it's take over hour for her to move one foot. I'm terrified of opening both doors at the same time tho! How long can I do this?