A cat that spends the first 72 hours under the bed is doing exactly what a cat should do. A cat still under the bed on day 7 with a full food bowl is a different case, and that is the point where the room has to get smaller instead of bigger. The fix costs 60 to 120 USD and takes 10 to 21 days of deliberate work.
Days 1 to 3: hiding is the plan
A newly adopted cat has lost every scent marker it owned. Hiding is how it buys time to rebuild a map of the room. Expect it to eat at night, 1 to 3 oz at a time, use the box once or twice, and move when the apartment is quiet. Do not pull it out, do not carry it to the food bowl, and do not invite 4 friends over to meet it. Visitors in week 1 add about 5 to 7 days to the adjustment.
What you do in these 3 days: put food, water, and litter in the same room the cat chose, close the door to the rest of the house, and sit in the room for 15 minutes, 2 times a day, reading out loud at normal volume.
Day 7 is the line
Three markers decide whether day 7 is normal or a problem. Food: under 1 oz eaten in 24 hours. Litter: no urine in 24 hours, no stool in 48 hours. Movement: zero voluntary movement while the room is empty, checked with a 30 USD camera or 2 nights of quiet watching. Any 1 of the 3 is a vet call the same day. A cat that stops eating for 48 to 72 hours starts mobilizing fat into the liver, and an overweight cat can be in trouble at 3 days.
Hiding alone, with normal food and litter, is behavioral. Hiding plus any 1 marker is medical until proven otherwise, and the exam plus bloodwork runs 120 to 250 USD.
With a resident cat, isolate the newcomer for 14 days minimum, 21 is steadier: swap bedding under the door for days 1 to 3, feed 2 feet apart on either side of the door from day 4, and allow 5 minutes of door-gap viewing from day 10. Test for FeLV and FIV before nose-to-nose contact, because a shared water bowl is enough to pass FeLV; the FeLV guide covers the positive result and the feral cat guide covers the cat that was never socialized at all. Testing 2 cats runs 40 to 90 USD, which the cost page lists with the rest of the first month.
The shrinking space method in 3 steps
Big rooms make shy cats worse, because there are 12 hiding places and no reason to leave any of them. Shrink the world to something a cat can own in 1 week.
- Step 1, one room: pick the smallest room with a door, 10 by 10 feet or less, and block the under-bed gap with storage bins so only 1 covered bed remains. That bed is 14 by 14 inches with 3 closed sides, in a corner, not the middle of the floor.
- Step 2, base camp: bed in 1 corner, food 3 feet from the bed, water 6 feet away from the food, litter in the opposite corner at least 8 feet from both. A cat will not eat where it eliminates, and it will not eliminate next to its bed.
- Step 3, inch outward: once the cat eats while you sit in the room, move the whole base camp 12 inches toward the door every 48 hours. Six moves is 6 feet in 12 days. At the door, leave it open 2 inches for 3 nights, then 12 inches.
Do not rush step 3. Moving the bed 3 feet at once resets the clock 4 to 7 days, and you will not get an explanation, just a cat back under the furniture.
Read the bowl and the box
| Day | Food eaten, oz | Urine clumps | Stool | Action |
|---|---|---|---|---|
| 1 to 3 | 2 to 4 total | 1 to 2 | 0 to 1 | Leave alone, 2 quiet visits |
| 4 to 6 | 4 to 6 | 2 to 3 | 1 | Start sitting 15 min, 2 times a day |
| 7 | 6 to 8 | 2 to 4 | 1 to 2 | Shrink space if no movement |
| 8 to 14 | 7 to 9 | 3 to 4 | 1 to 2 | Move camp 12 in every 48 hours |
| 15 to 21 | 8 to 10 | 3 to 5 | 1 to 2 | Door open 12 in, add 1 room |
A 9 lb cat should land at 5.5 to 6.5 oz of canned food or 1/3 to 1/2 cup of dry per day by week 3. Weigh weekly on a baby scale: a 5 percent drop in 7 days is a vet visit, not a shyness problem.
What progress actually looks like
Progress is not a cat on your lap. It is 4 smaller events: eating while you sit 3 feet away, coming out within 5 minutes of the door closing, exploring 20 minutes after lights out, and sleeping in the open on 3 nights out of 5. Those 4 markers usually arrive between day 10 and day 21, and full house access is reasonable at week 4 to 6.
When hiding means pain
Hiding is also the first sign of dental pain, arthritis, and urinary blockage. Book an exam if the cat hides plus any of these: hunched posture for more than 12 hours, yowling at night, urinating outside the box, grooming 1 spot until bald, breathing faster than 40 breaths a minute at rest, or a 5 percent weight loss in 30 days. A male cat straining in the box with no urine for 12 hours is an emergency and can be fatal in 24 to 48 hours.
Costs and the 30 day plan
Setup is modest: a 3-panel pen or 2 storage bins 30 to 60 USD, a covered bed 20 to 40 USD, a pheromone diffuser 20 to 35 USD. Monthly food and litter for 1 cat runs 45 to 90 USD. A behavior consult, if week 6 still looks like week 1, is 150 to 300 USD and usually 1 to 2 sessions.
Days 1 to 3, no contact. Days 4 to 7, 2 seated visits a day. Days 8 to 14, move the camp 12 inches every 48 hours. Days 15 to 21, open the door 12 inches and add 1 room. Days 22 to 30, add the rest of the house 1 room at a time, and keep the base camp set up for 3 months. Life expectancy is unchanged at 12 to 16 years indoors; shyness is not a disease, but 6 weeks of total hiding deserves a second opinion.
Terms mentioned in this article
Frequently asked
Is it normal for a newly adopted cat to hide all day?
For the first 3 days, yes. A new cat has lost every familiar scent marker and hiding is how it rebuilds a map of the room. Keep food, water, and litter in that one room, sit quietly for 15 minutes twice a day, and expect it to eat 2 to 4 oz in total over those first 72 hours.
When does hiding become a veterinary problem?
Day 7, or any day with 1 red marker: under 1 oz of food in 24 hours, no urine in 24 hours, no stool in 48 hours, or no movement at all while the room is empty. A cat that stops eating for 48 to 72 hours can start liver problems, and an overweight cat can be in trouble by day 3.
How long until a hiding cat comes out on its own?
Most cats show the first 4 markers between day 10 and day 21: eating 3 feet from a seated person, coming out within 5 minutes of the door closing, exploring 20 minutes after lights out, and sleeping in the open 3 nights out of 5. Full house access usually works by week 4 to 6.