How should I introduce furniture for a second cat?

Introduce a second cat's furniture as part of that cat's own settled area, rather than immediately moving it into the resident cat's favourite space. A newcomer benefits from familiar-smelling bedding and access to essential items without competition. Allow exploration at the cat's pace and keep the furniture stable and fully assembled before use. The introduction of the cats themselves should be gradual; a new tower does not replace that process.

When both animals are ready to share more of the home, keep alternative beds, hideaways and scratching places available instead of removing the separate setup all at once. Watch whether either cat guards the new item or avoids an area it previously used. It may help to distribute furniture more widely rather than clustering everything together. Avoid swapping every familiar object simultaneously, because that makes it harder to understand what each cat finds reassuring or difficult.

Label your introduction plan by location rather than by ownership: newcomer room, shared room and resident retreat. That makes it easier to see which resources remain reachable at each stage without assuming the cats will divide furniture equally.