The boxes go up and your cat goes quiet. Not hiding exactly, watching. Something in the air has shifted before a single piece of furniture has moved, and your cat clocked it before you did.
Cats do not experience a house move the way dogs do. A dog's territory is largely social: wherever the pack is, that is home. A cat's territory is spatial. It is built from scent marks deposited over weeks and months, cheek rubs on doorframes, chin marks on chair legs, slow blinks at a familiar window. The flat your cat lives in is not just a place it occupies. It is a map it has authored. Moving erases that map entirely.
What your cat is actually losing
Cats navigate by scent in a way that has no human equivalent. A room that smells of your cat is a room it has claimed as safe. A new flat smells of strangers, paint, cleaning products, and the particular silence of an unmapped space. For a cat arriving in that flat, every surface is unknown and therefore potentially threatening until proved otherwise.
This is why the first behaviour most owners see in a new home is not curiosity, it is concealment. The cat finds one small space, usually dark and enclosed, and stays there. This is not distress in the way we mean it. It is the cat doing the only rational thing: holding still until it has enough information to move safely.
What the cat is also losing is predictability. In its old home it knew where the light fell at midday, which floorboard creaked, where the pigeons landed on the ledge. Cats are creatures of pattern, and the new flat has none yet. Building those patterns takes time, usually days to weeks for a confident cat, longer for an anxious one.
The first 48 hours: what actually helps
The instinct is to let the cat explore freely and get it over with. This usually makes things harder. A large, unfamiliar space with too many exits and no established safe point is overwhelming. The better approach is to start small.
Set up one room before the cat arrives, ideally a room you will be in frequently. Put the litter tray, water, and a piece of bedding that carries the cat's own scent in that room. Let the cat stay there for the first day or two. It will begin to scent-mark the space, which means it will begin to feel safe in it. Once it is moving around that room with something approaching its normal posture, tail up, head level, not flattened, it is ready for more space.
The things that help most are the things that already smell like your cat: its old blanket, your worn clothing, the scratch post it has been using for two years. These are not comfort objects in a sentimental sense. They are chemical anchors. They tell the cat's nervous system that this new place has some connection to the territory it already knew.
Pheromone diffusers that replicate feline facial pheromones are available from vets and pet pharmacies. The evidence for their effect is mixed, but they carry no risk and some cats respond to them. Worth trying in the first week, particularly for cats that have shown anxiety in previous disruptions.
Reading the signs: normal adjustment versus something more
A cat that hides for a day or two, eats less, and watches everything carefully is adjusting normally. A cat that stops eating entirely for more than two days, stops using the litter tray, or develops loose stools that persist beyond three or four days needs a vet call. Stress can tip into physical illness in cats faster than most owners expect, particularly in cats that were already managing a health condition.
Watch for over-grooming, patches of thinning fur on the belly or inner legs, which can appear within a week of a major stressor. Watch also for the opposite: a cat that stops grooming altogether. Both are signs the stress load has exceeded what the cat can self-regulate.
Hiding is normal. Hiding combined with not eating, not drinking, laboured breathing, or any sign of pain is not. If you are uncertain, call your vet. Stress-related illness in cats is easier to manage early than once it has taken hold.
What the move reveals about your cat
The move is one of the few situations that shows you your cat's baseline anxiety level with no ambiguity. A cat that was relaxed in the old flat and becomes severely distressed by the move, more than a week of hiding, refusal to eat, aggression it did not show before, is telling you something about its nervous system that was always true and simply had no occasion to show itself.
This is useful information. It means that future disruptions, a new pet, building work, a change in your schedule, are likely to affect this cat more than you might have assumed. It is not a flaw. It is a characteristic, and knowing it lets you manage it.
Conversely, a cat that adjusts within two or three days and begins scent-marking the new flat with visible enthusiasm is showing you a resilience you can rely on. Some cats find a new territory genuinely interesting. The move teaches you which kind of cat you have.
The map your cat builds in the new flat will eventually be as detailed and as owned as the one it left behind. The doorframes will get their rubs. A favourite window ledge will be claimed. The floorboard pattern will be learned. It just takes longer than we expect, and it goes better when we stop trying to rush it.