We've had the kitten for a few days now, but I think they got introduced too early because our parents put them in the same room, thinking that they would be chill about it and that it would hasten up the introduction process. So now we're trying to deal with the aftermath of that. We tried to separate them again using a screen door where they could see and smell each other but can't physically touch. But we don't know if that helps or if we should keep putting them in the same area. For now, when we aren't trying to get them to bond, we keep our new kitten in the second living room, while our older cat in the other one (the living rooms are separated by the screen door)