Well, Luke has realized that he's not going to be cast out into the cold, but he does get a bit anxious when we close the door to the room he's being kept in as we exit.
We're doing this for two reasons:
1. He has worms, as do most kittens. So we want to keep the 'old ladies' away from the litter box until everything is, um, cleaned out.
2. We need to have the 'old ladies' grow accustomed to the new member of the household. On the occasions we've let them see Luke, there was some definite hissy fits, with an emphasis on the HISS !!
The oldest, Delenn, still has issues with her younger 'sister', Padme (OK .. can you see the drift on the naming convention we use ??). However, they do get along, as two spayed females. We're now introducing a male kitten into the mix. While he is not yet old enough to be neutered (in six months), and is still in his childhood; there may be some pheromones that the ladies are not used to sensing.
So, we're using Feliway pheromone atomizers to try and calm them down. In the meantime, Luke is exploring his galaxy.
... and so it goes!!