Cats aren't pack animals so bonding takes time. Not all cats are happy to make friends! Keep at it with patience. They will either become friends or learn to tolerate each other. haha
It wont be long now until they are all living as one!!! Slow and steady wins the race!!
It's interesting...Buff and Cooper seem to be self regulating in the amount of time they spend downstairs when they are in free-range mode.
They are both fascinated with Miss Teia, but also self-regulate the amount of time they try to get close to her.
This lasted about a minute until Missy T decided to his and disperse the crowd. I'll take it as progress, however.
She's probably gotten bored with being annoyed and has decided to join the obvious fun.