The single most common mistake people make with a new cat is giving them too much space too soon. The impulse is generous — you want them to explore and feel free — but a cat suddenly dropped into a large unfamiliar environment often becomes overwhelmed, hides for days, and takes weeks longer to settle than a cat that was introduced gradually.
Go slower than feels necessary. It's almost always worth it.
Phase 1: The base room (days 1-7)
Before the cat arrives, set up a single quiet room as their starting space. A bathroom or spare bedroom works well. Include everything they need: food, water, a litter box (on the opposite side of the room from the food — cats won't eat near where they eliminate), a bed or soft hiding spot, and a few things with your scent. Close the door.
When you bring the cat home, take them directly to this room in their carrier. Open the carrier and let them come out on their own. Don't coax or rush. Leave them to explore the base room while you go about your normal life. Check on them calmly, sit in the room with them without forcing interaction, and let them set the pace.
A cat that hides under the bed for the first two days isn't failing — they're doing exactly what cats do in an unfamiliar space. Make sure they're eating and using the litter box. If they're doing both, they're adjusting normally.
Phase 2: Expanding access (days 7-14)
Once the cat is coming out of hiding voluntarily and seems comfortable in the base room — eating normally, grooming, maybe even approaching you — you can start letting them explore a bit more. Open the door to the rest of the home and let them discover at their own pace. Keep the base room available as a retreat. Don't remove the hiding spots.
This phase varies a lot by cat. A bold kitten might be exploring the whole house in three days. A shy adult rescue might take three weeks. Neither is wrong — push neither.
If there's already a resident cat
The introduction process takes longer and requires more structure. The core principle: let them get used to each other's scent before they meet face to face. Swap bedding between the cats so they can smell each other. Feed them on opposite sides of a closed door so they associate each other's smell with something positive. Once both cats seem calm about the scent, allow brief visual contact through a cracked door or baby gate.
Don't let them meet directly until both cats are curious rather than hissing or hiding from the scent alone. This typically takes 1-3 weeks. Rushing it usually means setbacks that extend the whole process.
Understanding how cats use eye contact and body language helps you read whether both cats are genuinely calm versus frozen and stressed. A slow blink from either cat is a good sign; fixed wide-eyed staring with a rigid body is not.
What to avoid
Don't force the cat out of hiding. Don't let a resident dog or cat just "sort it out" without management. Don't punish hissing — it's communication, not aggression, and punishing it removes the cat's ability to signal. And don't interpret a slow adjustment as a problem. The cats that take longest to emerge often become the most attached once they do.