The first year after adoption is not 12 identical months. It is 5 checkpoints, and the one that decides whether the cat stays is week 2 to 6, when the cat stops hiding and starts testing the rules. Miss that window and a fixable problem turns into a 6 month standoff over the litter box.
Put the 5 dates in a calendar on day 1: week 1, 2, 4, 8, 12. Each has 3 to 5 items and takes under 60 minutes.
Why week 2 to 6 is the peak
The working rule is 3 days to decompress, 3 weeks to learn the routine, 3 months to feel at home. Behavior complaints cluster in week 2 to 6 because that is when a cat stops hiding under the bed and starts claiming territory: door dashing, 5 a.m. yowling, swatting when picked up, spraying 1 spot near the balcony, urinating on the bath mat. None of that is dominance. It is a cat with no map yet.
A cat that hides for 3 days is normal. A cat that hides for 6 weeks is a welfare problem and needs a vet check plus a smaller territory, not more time.
Week 1: 5 items, 1 room
1 room with the door shut, box 1.5 m from food and water, and 3 hiding options: a box on its side, a covered bed, and a chair with a blanket. Vet visit within 7 days for weight, fecal exam, deworming, FIV and FeLV test, and a microchip scan. Get the vaccine history in writing, because an adopted adult may need 1 booster or 3.
Feed on a schedule from day 1, 2 meals for an adult and 3 to 4 for a kitten under 6 months. Free feeding hides the first sign of illness, which is a cat that stops eating for 24 hours.
Week 2: the house opens
Open 1 room every 2 to 3 days, not all at once. 2 play sessions of 10 to 15 minutes, wand toy first, then a food puzzle. Start 5 minutes of handling a day: ears on day 1, paws on day 2, mouth on day 3, tail on day 4. Leave the carrier in the living room permanently; a carrier that appears only for vet visits is a 20 minute fight by month 3.
Week 4: booster and the first behavior review
Second vaccine 3 to 4 weeks after the first, a weight check, and a nail trim. This is also the first honest review: is the cat using the box every time, eating within 10 percent of the target amount, and sleeping in the open rather than under furniture? Litter boxes should number cats plus 1, so 2 boxes for 1 cat, in 2 different rooms. One box in a laundry room is the most common avoidable cause of a week 6 problem.
Week 8: the boring visit
Third vaccine if the schedule calls for it, rabies where required by law, a dental look, and a parasite plan. Ask for flea and tick coverage by weight and by month, and write down the product name and the next due date: 2 products with similar names can have different intervals.
Week 12 and month 6: close the loop
Week 12: the last kitten vaccine if the cat was under 16 weeks at adoption, and the 1 year booster date written down. Month 6: a full blood panel for a cat over 8, a weight trend, and a dental check. Book the year 1 annual before you leave the building, 11 months out, because the appointment that gets forgotten is the one that matters most.
The 5 checkpoints at a glance
| When | What to check | Number that matters |
|---|---|---|
| Week 1 | Vet visit, weight, fecal, deworming | Within 7 days, box 1.5 m away |
| Week 2 | Room access, play, handling | 1 room per 2 to 3 days, 2 sessions of 10 to 15 min |
| Week 4 | Booster, behavior review | 3 to 4 week gap, boxes = cats plus 1 |
| Week 8 | Third vaccine, dental, parasites | 1 dose, monthly prevention |
| Week 12 | Final vaccine, annual booked | 16 week cutoff, 11 months ahead |
| Month 6 | Blood panel if over 8 | 1 full panel, 1 weight trend |
When to call a behavior specialist
4 triggers earn a referral: urine or stool outside the box on 2 or more days per week for 3 weeks after a vet has ruled out cystitis and constipation; aggression that breaks skin; overgrooming that leaves a bald patch 2 cm or wider; and cat-to-cat conflict with 3 or more fights a day. Add 1 rule on top: 6 weeks of a consistent protocol with no improvement is data, not failure.
Behavior work is not obedience training. A behaviorist looks at litter substrate, box size, feeding stations, and sightlines between resources, then changes 2 or 3 variables at a time so you can tell what worked. Expect 3 to 6 sessions over 2 to 3 months, and expect the cat to get worse for 5 to 10 days before it gets better.
Year 1 money, in 3 brackets
300 to 700 USD for a healthy adult with 2 vaccine visits. 600 to 1,200 USD for a kitten with 3 vaccine visits and a neuter. 900 to 1,800 USD if a dental or a senior panel lands inside the same 12 months. The line by line version is at /tools/cost/. A cat adopted at 10 or older needs the blood panel in month 1 rather than month 6, and the pace of everything changes: see /adopt/senior-cat-adoption/.
The week 1 visit is the one that sets the baseline for all of it, and the 7 day version of that checklist is at /adopt/first-vet-visit-after-adoption/.
Put these 5 dates in your phone
- Day 7: vet visit with fecal sample in a sealed bag, weight recorded in grams.
- Day 14: second room open, 2 play sessions logged, carrier out for good.
- Day 28: booster, weight compared with day 7, box count checked.
- Day 56: dental look, parasite due date written on the fridge.
- Day 84: annual booked, and 1 photo of the cat sleeping in the open as your baseline.
Terms mentioned in this article
Frequently asked
Why do behavior problems show up at week 2 to 6?
Because that is when decompression ends. For the first 3 days most cats hide and eat little; by week 2 they claim space, and conflict appears: door dashing, night yowling, spraying 1 spot, urinating outside the box. Handle it in that window with 2 boxes, 2 play sessions a day, and a vet check.
How many litter boxes does 1 adopted cat need?
Two, in 2 different rooms, and the count should be cats plus 1 in any multi-cat home. A single box in a laundry room is the most common avoidable cause of a week 6 problem, because a cat that feels cornered or hears the washer start will pick the bath mat instead.
What does the first year cost?
300 to 700 USD for a healthy adult with 2 vaccine visits, 600 to 1,200 USD for a kitten including 3 visits and a neuter, and up to 1,800 USD if a dental or a senior blood panel falls in the same 12 months. Add 60 to 120 USD for a first behavioral consult if needed.