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You open the carrier, hoping your resident cat will be delighted. The newcomer has other concerns: unfamiliar smells, an unknown room and an animal watching from the doorway.
A little preparation gives both cats more control over that encounter. It begins before they can reach one another.
Give the newcomer a room
Cats Protection's introduction guide recommends a separate sanctuary with the resources the new cat needs. Arrange food, water, a litter tray, resting places and somewhere to hide, with suitable separation between them.
Choose the room before collection day. Check how its door closes and whether anyone is likely to leave it open accidentally. In a busy household, an agreed door routine is more dependable than hoping everybody remembers there is a cat behind it.
Keep the resident cat's familiar resources available. Bringing in another animal already changes the home; removing a favourite resting place at the same time adds another disruption.
Introduce scent before close contact
The Feline Veterinary Medical Association's step-by-step guide describes a gradual process that moves from separate spaces and scent familiarity towards controlled visual contact.
A cloth carrying a cat's cheek scent can let the other investigate without meeting. Offer the choice to approach or ignore it. Later, a secure mesh or glass barrier allows observation while preventing direct pursuit.
Check the barrier from the cats' side of the arrangement. A gate with kitten-sized gaps, or an easy route over the top, may not provide the separation you intended. Keep early encounters short and allow retreat.
Watch for quieter tension
Fighting is an obvious sign that something has gone wrong. The 2024 intercat tension guidelines also emphasise subtler behaviour, including staring, blocking access and avoidance.
A cat that waits until the other has left before using a route may be adapting to pressure. A doorway occupied for long stretches can function as a checkpoint even without a hiss.
That is why resources need to be distributed. Two bowls touching each other still require both cats to approach the same place. Two resting areas help less if reaching either means passing the other cat.
Before beginning, agree who in the household will manage doors and feeding. A careful setup can be undone by one person opening a connecting room because the cats seem quiet that afternoon.
Write down the current stage and the next small step, then update everyone together. This is particularly helpful when work schedules mean different people supervise at different times. A shared record can describe behaviour plainly, such as relaxed eating at a distance or repeated attempts to withdraw, without turning the process into a competition to reach a deadline.
Let behaviour set the pace
Move forward when both cats remain comfortable at the current stage. If tension appears, return to an easier arrangement. Do not force nose-to-nose contact or let a fight continue in the hope that the pair will settle their relationship.
Shared games are not an early requirement. Reward-based training can help you work with each cat separately while maintaining predictable routines.
Some cats form close bonds; others manage a peaceful household with plenty of personal space. If either cat stops eating, hides persistently or shows aggression, seek veterinary and qualified behavioural help. The aim is a home each animal can use comfortably, including when you are not watching.
