I recently got a new kitten to be a buddy with my other cat about 3 or 4 days ago. The kitten is 3 months old and my other cat is about a year and a half old. My older cat has not been hostile towards the new kitten in any way yet, but hisses and runs away if she hears him meow. She refuses to to come out of my bed room, mostly staying in my beds boxsping except for at night. I have been keeping the kitten in the bathroom and spending about even time with them. I have swapped some toys and scratching posts to try and get them used to eachothers scent but my older cat is still terrified. What should i do from here and when would it be fine to let them see eachother through a door crack or anything like that? older cat only saw the kitten in a crate when i first brought him in the door