The carrier door swings open, the cat shoots under the bed, and your carefully planned welcome collapses in four seconds. Every year, thousands of UK adopters live some version of this scene — and most of them accidentally make the first week harder than it needs to be, through no fault of their own. The first seven days set the emotional template for your entire relationship with a new cat: get them right and you build a foundation of trust; get them wrong and you spend months repairing it. Here is the best way to help a new cat settle in during the first week, distilled from feline behaviour science and the hard-won experience of rescue fosterers.

Before the cat arrives: the 24-hour setup

Settlement starts before adoption day. Prepare a single “safe room” — a quiet bedroom or study — containing a litter tray (one per cat plus one spare is the rule, but one is fine for week one in a single room), food and water bowls placed apart from each other and away from the litter tray, a scratching post, and at least two hiding options: a cardboard box on its side with a blanket, and space under or behind furniture. Wash new bedding first; strong factory smells unsettle cats. If you have other pets, plan a scent-first introduction: keep the new cat’s room door closed for the full first week, and swap bedding between animals so everyone learns the newcomer’s smell before meeting the newcomer.

Cat-proof the safe room properly: secure blind cords, close windows or fit restrictors, check for gaps behind wardrobes where a terrified cat could wedge themselves irretrievably, and remove toxic houseplants — lilies can be fatal to cats even in tiny nibbled amounts. The Cats Protection home-safety guidance has a room-by-room checklist worth running through the evening before.

Day one: the art of doing almost nothing

Open the carrier in the safe room, then leave. Seriously — sit quietly on the floor for twenty minutes if you like, reading aloud in a calm voice, but do not coax, do not reach in, and do not let children “say hello”. Most cats will not eat for several hours; some not until nightfall. That is normal. Leave food, water and the litter tray, dim the lights, and give them the evening to decompress. Your only jobs on day one are to check from a distance that the cat is breathing normally and to keep the house calm — no hoovering outside the door, no dinner party.

Resist the urge to constantly check. Every time you open the door and peer under the bed, you reset the cat’s stress clock. Two or three calm visits are plenty. Talk softly when you enter so your arrival is never a surprise — cats startle at sudden appearances, and a startled cat files you under “threat”.

Days two to four: routine is everything

Cats are ritualists; predictability is safety. Feed at the same times daily, scoop the tray at the same time, and visit on a schedule. Sit on the floor during visits — you are less threatening at cat height — and let the cat set the distance. Read, scroll, be boring. Offer a finger to sniff rather than a hand to stroke; a sniffed finger that retreats teaches the cat that you respect boundaries, which paradoxically accelerates trust.

This is also when you learn your cat’s language. Slow blinks mean contentment — return them. A tail held high with a slight quiver means happy to see you. Flattened ears and a twitching tail mean back off. The Blue Cross guide to cat body language will decode the subtleties faster than any other single resource. Start brief play sessions with a wand toy at a distance: play builds confidence and gives a nervous cat a way to interact with you that does not involve being touched.

What about food refusal?

A cat that has not eaten for 24 hours needs monitoring; beyond 48 hours, call the vet — cats that do not eat risk hepatic lipidosis (fatty liver disease), which can develop scarily fast, especially in overweight cats. Tempt with strong-smelling foods: warmed wet food, a little tuna in spring water, or commercial lick treats. Often the fix is simply privacy — many new cats eat only when the room is empty and dark.

Days five to seven: gentle expansion

If the cat is eating, using the tray and emerging in your presence, you can begin widening their world. Prop the safe-room door open for supervised exploration sessions — an hour in the evening, with other pets secured elsewhere. Let the cat retreat to base whenever they want; the safe room stays available for weeks, not days. Introduce one new experience at a time: the hallway today, the living room tomorrow. Do not introduce the whole household, the dog and the hoover in a single afternoon.

This is also the week to book the vet visit if the rescue has not done a recent one: a health check, microchip verification (legally required — ensure the chip details are transferred to you via an approved database) and a conversation about vaccination schedules. A cat in pain or discomfort cannot settle, so rule out health issues early — and you can verify any vet’s credentials on the RCVS register.

The five first-week mistakes everyone makes

Too much space, too soon — the whole-house tour on day one overwhelms; the safe room exists for a reason. Too many visitors — well-meaning friends in week one read as a home invasion. Changing everything at once — new home, new food, new tray litter and new routine simultaneously is a lot; keep the rescue’s food for the first fortnight and transition gradually. Punishing fear — hissing, hiding and refusing food are stress responses, not misbehaviour. Giving up on the tray — a cat avoiding the tray is usually signalling a problem (wrong litter, wrong location, stress, or a urinary issue), not being difficult; troubleshoot rather than scold.

If you have adopted a particularly nervous cat, be prepared for a longer journey — and learn to recognise when anxiety needs professional help, for your cat’s sake and your own peace of mind.

Conclusion

The best way to help a new cat settle in during the first week is almost embarrassingly simple: one safe room, total predictability, food-based patience, and the discipline to let the cat come to you. You will feel like you are doing nothing. You are actually doing the hardest and most important thing in cat ownership — proving, hour by hour, that you are safe. By day seven, most cats are eating confidently, exploring cautiously and watching you with curiosity instead of fear. That curiosity is the beginning of everything. And once the bond is built, the adventures can start — including learning how much it costs to take a dog on a UK holiday, for when a future canine companion joins the family.

Frequently Asked Questions

What is the best way to help a new cat settle in during the first week?

Set up a single safe room with food, water, litter tray and hiding spots; keep a strict daily routine; visit calmly without forcing contact; let the cat explore the wider home only from day five onwards. Patience in week one prevents months of problems.

How long before a new cat stops hiding?

Most cats reduce hiding significantly within 3–7 days in a well-managed safe room, though shy rescues may take two to three weeks. Hiding is normal coping behaviour — provide hiding spots rather than trying to eliminate them.

Should I sleep in the same room as my new cat?

It is not necessary and can disturb a nervous cat’s night-time exploring, which is when they build confidence. A better approach is to spend calm evening time in the safe room, then leave them to investigate the space alone overnight.

When can a new cat meet my existing pets?

Not in the first week. Keep the newcomer in their safe room for at least 7–14 days, doing scent swapping (exchanging bedding) first, then feeding on opposite sides of the closed door, then brief visual contact. Rushing introductions is the top cause of lasting inter-cat conflict.