· Golden Sierra Cat Club
Bringing home a rescue: the first 72 hours
The most common mistake with a new rescue cat is giving it too much space too quickly. Here is what the first three days should look like.

The instinct when a rescue cat arrives is to show it everything — the whole house, the whole family, all at once. It comes from kindness and it usually backfires. A cat that has just lost every familiar smell in its life does not want options. It wants somewhere small that it can learn quickly.
Day one: one room
Set up a single room before the cat arrives. Litter tray in one corner, food and water well away from it, a bed, and at least two places to hide — a covered bed and an open cardboard box will do. Put the carrier down, open the door, and leave. Do not lift the cat out.
Some cats come straight out. Many go under the bed for several hours. Both are normal. The thing that is not optional is that the cat gets to choose when.
Day two: presence without pressure
Spend time in the room doing something that is not about the cat. Sit on the floor, read, answer email. Let it approach you. Every time you reach for a cat that has not offered itself, you teach it that people arrive uninvited.
Check that it is eating, drinking, and using the tray. A cat that has not eaten in 24 hours is worth mentioning to your vet, and one that has not eaten in 48 needs to be seen — cats do not tolerate fasting the way dogs do.
Day three: widen slowly
If the cat is eating normally and coming to you, open the door and let it explore on its own terms. Leave the safe room set up exactly as it was. It will go back there, possibly for weeks, and that is the point — it is the place it already knows.
What not to rush
Other pets, visitors, and children all wait. Introductions between animals are done by scent first, through a closed door, over days rather than minutes. Nothing about this is improved by hurrying it.
And book the vet check early even if the cat seems well. A rescue arrives with a history you do not have, and a baseline examination in the first week is worth more than any amount of watchful worrying.