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15 min · Essential read · /guides/your-first-cat-from-litter-box-to-first-vet-visit/

Your first cat: from litter box to first vet visit

15-min read covering setup, first week, common issues.

Start with the simple truth

Your first week with a cat is not about buying the most expensive things. It is not about making the cat cuddle on day one.

It is about three basics:

  1. Make the home safe.
  2. Give the cat a quiet starter room.
  3. Book a basic health check soon.

A new home is stressful for many cats. Hiding, eating only at night, and using the litter box when no one is watching can be normal at first. Your job is not to force trust. Your job is to make food, water, litter, and people feel predictable.

The AAHA/AAFP feline life stage guidelines recommend that cat care be based on age, lifestyle, and risk. For kittens, the main topics include vaccination, parasite control, nutrition, behavior, and spay/neuter planning.[^1]

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1. Before the cat comes home: what to prepare

Basic supply list

| Category | What to prepare | Why it matters |
|---|---|---|
| Travel | Carrier | A top-opening carrier makes vet visits easier. |
| Litter | Litter box, litter, scoop | Start with the litter the cat already knows. |
| Food and water | Food bowl, water bowl or fountain | Keep food and water in separate spots. |
| Main diet | Complete cat food or complete wet food | Keep the old food at first. Change slowly later. |
| Rest | Bed, blanket, cardboard box | A hiding place matters more than a fancy bed. |
| Scratching | Scratching pad, scratching post | Cats need a legal place to scratch. |
| Play | Wand toy, small toys, food puzzle | Short play sessions help reduce stress. |
| Cleaning | Enzymatic cleaner, trash bags | Useful if accidents happen. Avoid strong smells. |
| Grooming | Brush, nail clippers | Do not rush grooming. Start with gentle handling. |

Cats Protection and Blue Cross list the carrier, food, water, litter tray, scratching post, toys, and a quiet space as core items for a new cat or kitten.[^2][^3]

Set up the litter box first

The litter box is not a minor detail. It can decide whether your cat feels safe toileting in the right place.

Use these rules:

  • Number: At least one litter box for one cat. If possible, use the “number of cats + 1” rule. Two cats should usually have three boxes.[^4]
  • Place: Choose a quiet and easy-to-reach spot. The cat should not feel trapped. Avoid washing machines, dryers, loud speakers, and busy walkways.
  • Size: The cat should be able to turn around inside. AAHA/AAFP recommends a box at least 1.5 times the cat’s length from nose to tail tip.[^5]
  • Litter: Do not change it right away. If you want to try a new litter, place a second box next to the old one and let the cat choose.
  • Cleaning: Scoop daily. Wash the box regularly. Avoid strong-scented cleaners.

If you buy only one box at first, choose a large one with easy entry. Kittens and older cats need a lower entrance. Adult cats need room.

Keep food stable at first

A new home is already a major change. Do not change the diet on day one unless there is a medical reason.

Start with the cat’s usual food. If you want to switch later, wait until eating and stool are stable. Then transition over about 7 days.

When choosing food, keep it simple:

  • Use food labeled as a complete daily diet.
  • Match the life stage. Kittens need food made for growth.
  • Treats are not meals.
  • Do not use raw meat, raw bones, or raw freeze-dried foods as the default. AAHA/AAFP notes that raw or non-sterilized animal-origin foods can carry pathogen risks.[^1]
  • If the cat has diarrhea, urinary problems, obesity, or chronic disease, ask a veterinarian first.

The WSAVA nutrition tools also remind owners not to judge food only by the ingredient list. Check nutritional adequacy, life stage, calories, manufacturer information, and quality control.[^6]

Make water easy to find

Many cats prefer water away from food. Put the water bowl a little distance from the food bowl. In a larger home, place more than one water station.

Wash bowls daily. Clean fountains often. A fountain is not a self-cleaning device.

Scratching is normal

Scratching is not bad behavior. Cats scratch to maintain claws, stretch, and leave scent.

You cannot teach a cat not to scratch. You can teach where to scratch.

Try this:

  • Put a scratching pad near the sofa.
  • Put a scratching post near doors, windows, or common walking paths.
  • Offer both vertical and horizontal options.
  • Reward the cat when it scratches the right place.
  • Do not hit, yell, or spray water. The cat will learn to fear you, not the sofa.

The AAFP/ISFM environmental needs guidelines emphasize security, key resources, play, and predictable human interaction. Meeting these needs can reduce stress and unwanted behavior.[^7]

Remove obvious home hazards

A new cat may squeeze into gaps, chew cords, or swallow small objects. Kittens are even more likely to do this.

Before pickup day, check for:

  • Open windows, loose screens, and balcony gaps.
  • String, rubber bands, sewing needles, plastic bags, hair ties, and small toys.
  • Loose electrical cords.
  • Open washing machines and dryers.
  • Cleaning products, disinfectants, and human medicine.
  • Lilies. True lilies and daylilies are dangerous for cats and can cause acute kidney injury.[^8]
  • Onion, garlic, chives, alcohol, chocolate, and other unsafe human foods. Allium plants are toxic to cats and dogs, and cooking or drying does not remove the risk.[^9]

If you think your cat ate something toxic, do not try home remedies. Bring the package, plant photo, or food sample and call a veterinary clinic.

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2. Day one: do less, not more

Give the cat a starter room

Do not let the cat roam the whole home right away. Start with one quiet room. A bedroom, study, or spare room works well.

Put these inside:

  • Food.
  • Water.
  • Litter box.
  • Cardboard box or hiding place.
  • Bed or blanket.
  • Scratching surface.
  • One or two toys.

Keep the litter box as far from food and water as the room allows. Keep water away from food if possible. Cats Protection recommends starting a new cat in a quiet room and not rushing full-home exploration.[^2]

Open the carrier and wait

Place the carrier on the floor. Open the door. Sit away from it.

The cat may come out at once. It may stay inside for hours. Both are normal. Do not reach in and pull the cat out. Do not tip the carrier. Do not crowd the cat with photos.

You can sit in the room and read or use your phone. Speak softly from time to time. Let the cat notice you without feeling trapped.

What can be normal on day one

These signs are common:

  • Hiding under the bed or inside a box.
  • Eating only at night.
  • Hissing.
  • Not playing.
  • Not wanting touch.
  • Using the litter box only when the room is quiet.

If the cat is alert and has food, water, and a litter box, you can observe.

Do not wait if you see trouble breathing, repeated vomiting, collapse, obvious pain, possible poisoning, no urine, or repeated litter box trips with little or no urine.

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3. The first week: a practical schedule

Day 0–1: safety and observation

The goal is not to pick up the cat. The goal is to confirm three things:

  • The cat knows where food is.
  • The cat knows where water is.
  • The cat knows where the litter box is.

Write down appetite, water intake, urine clumps, stool shape, sneezing, and eye or nose discharge.

Day 2–3: build a routine

Cats like predictable patterns. Feed at regular times. Scoop the litter box at regular times. Offer short play sessions.

Play does not need to be long. Five to ten minutes is enough. Move the wand toy like prey. Let it hide, stop, and run. Do not wave it constantly in the cat’s face.

If the cat approaches, offer one finger to sniff. If the cat rubs against you, gently stroke the cheek, chin, or shoulder area. Do not rush to pick the cat up.

Day 4–5: expand space slowly

If the cat is eating, drinking, toileting, and exploring the starter room, you can open the door and allow supervised access to a small new area.

Do not open the whole home at once. A scared cat may hide somewhere you cannot reach.

Day 6–7: introduce other pets slowly

If you already have a cat or dog, do not introduce them on day one. Keep them separate. Start with scent exchange.

Use a clean cloth to gently rub near one pet’s cheek, then place the cloth in the other pet’s area. When both animals stay calm around the scent, move to short visual introductions through a door crack, baby gate, mesh door, or glass.

Keep meetings short. End before either animal becomes tense.

Cats Protection also recommends gradual introductions. Some cats accept each other in a day. Others need weeks.[^2]

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4. The first vet visit: when to go and what to expect

When to book

If the cat looks healthy, book the first veterinary check within a few days of arrival. Kittens, newly adopted cats, and cats with unknown history should be checked early. Blue Cross recommends a vet check a few days after a kitten comes home and taking any existing health records to the visit.[^3]

Do not wait for a routine appointment if the cat is not eating, has severe diarrhea, vomits repeatedly, has thick nasal discharge, struggles to breathe, has swollen eyes, seems dehydrated, is injured, or may have eaten something toxic.

If you already have cats at home, keep the new cat separated until the basic health check is done. This lowers the risk of spreading infections or parasites.

What to bring

Bring these if you have them:

  • Adoption or purchase records.
  • Vaccination record.
  • Deworming record.
  • Spay/neuter record.
  • Microchip number.
  • Old lab results.
  • Photos of the current food.
  • Notes from the past 24–48 hours: food, water, urine, stool, behavior.
  • Videos of any coughing, limping, sneezing, vomiting, or strange behavior.

A video is often clearer than a verbal description.

What the vet may check

Clinics differ, but a first check often includes:

  • Weight and body condition.
  • Eyes, ears, nose, mouth, and teeth.
  • Skin and coat.
  • Heart and lungs.
  • Abdominal palpation.
  • Temperature.
  • Fleas, ear mites, ticks, and other external parasites.
  • Stool testing or parasite risk assessment.
  • Vaccine history and future vaccine plan.
  • FeLV/FIV testing needs.
  • Spay/neuter, microchip, weight, and feeding advice.

Cornell Feline Health Center notes that a veterinarian may check a new cat for internal and external parasites and discuss treatment and prevention. It also states that kitten FVRCP vaccination usually starts at 6–8 weeks of age and is boosted every 3–4 weeks until about 16–20 weeks.[^10]

The AAHA/AAFP vaccination guidelines classify FHV-1, FCV, FPV, rabies, and FeLV for cats under 1 year of age as core vaccines. Continued FeLV vaccination in adult cats depends on lifestyle and exposure risk. Rabies vaccination must also follow local law.[^11]

The AAFP retrovirus guidelines recommend knowing the retrovirus status of cats at risk. Newly acquired cats, cats exposed to infected or unknown-status cats, and cats before FeLV or FIV vaccination should be tested as soon as possible.[^12]

Eight questions to ask the vet

  1. Is this cat’s weight healthy?
  2. Should the cat eat kitten food, adult food, or a special diet?
  3. Which vaccines are still needed?
  4. Does this cat need FeLV/FIV testing?
  5. What parasite prevention is appropriate?
  6. When should spay or neuter be discussed?
  7. Should the cat be microchipped?
  8. Do hiding, vocalizing, soft stool, or litter box issues need action now?

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5. Common questions

Q1: My cat keeps hiding. Does it dislike me?

No. Most of the time, hiding means stress. The home smells new. The sounds are new. The people are new.

Give the cat hiding places. Keep the room quiet. Feed on a routine. Do not force contact. Let the cat approach.

Q2: What if the cat does not eat on the first day?

Place food in a quiet spot. If needed, move it a little closer to the hiding place. Do not stare at the cat while it eats. Many cats eat at night when the house is quiet.

If an adult cat has not eaten for 24 hours, or a kitten clearly refuses food for half a day, call a veterinarian. Cornell lists anorexia as a clinical sign linked with many feline health problems.[^13]

Q3: I have not seen urine for a day. Is that normal?

Some cats hold urine for a while in a new place. But repeated litter box trips, straining, crying, licking the genital area, or producing only drops of urine are urgent signs. This is especially serious in male cats. Urinary blockage can be life-threatening.

Q4: Is my cat peeing outside the box out of revenge?

No. Cats do not plan revenge in that way.

Common causes include a box that is too small, dirty, scary, or hard to reach; disliked litter; stress; urinary disease; gut disease; or parasites.

Start by ruling out medical causes. Then improve the litter setup. AAHA/AAFP also advises prompt veterinary help for house-soiling so the problem does not become fixed.[^5]

Q5: Should I bathe the cat right away?

Usually, no. Cats groom themselves. Bathing a new cat often adds stress.

Do not bathe unless the cat is covered in oil, feces, chemicals, heavy flea dirt, or your veterinarian recommends it.

Q6: Can the cat sleep in my bed?

Yes, but there is no rush. First confirm the cat is healthy and has no obvious parasite problem. Also let the cat choose contact.

Be more careful with small kittens, children, older adults, pregnant people, or anyone with a weakened immune system. Wash scratches and bites well.

Q7: Should I get another cat as a friend?

Not necessarily. Cats do not need to be kept in pairs. Many cats live well as the only cat.

If you add another cat, resources matter. Prepare separate litter boxes, food stations, water stations, resting spots, and hiding places. Introductions should be slow.

Q8: Why does my cat meow at night?

First rule out pain, hunger, heat cycles, and litter box problems. A healthy cat may be active at night because it slept all day and has unused energy.

Try a short wand-toy session before bed, then offer a small meal. Do not reward every night meow with treats. Cats learn that quickly.

Q9: Can I let the cat go outside?

Do not let a new cat outside right away. Wait until the cat has had a health check, needed vaccines, identification, and spay/neuter planning. Many families choose indoor-only living and add climbing spaces, window perches, food puzzles, and daily play.

Cats Protection also advises that cats should be settled, vaccinated, microchipped, and neutered when appropriate before outdoor access is considered.[^2]

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6. Same-day vet red flags

Do not “watch for two more days” if you see any of these:

  • No urine, or possible inability to urinate.
  • Labored breathing or open-mouth breathing.
  • Repeated vomiting, or vomiting with weakness.
  • Collapse, severe lethargy, or inability to stand normally.
  • Possible exposure to lilies, medicine, cleaning products, onion, garlic, chocolate, or other toxins.
  • No food for more than 24 hours in an adult cat. Ask sooner for kittens.
  • Severe diarrhea, blood in stool, or black stool.
  • Severe eye redness or inability to open an eye.
  • Injury, bite wound, limping, or ongoing pain.
  • Abnormal temperature, hot ears or paws with poor energy.

Cats are good at hiding illness. By the time a cat “looks very sick,” the problem may already have been present for a while.

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7. A simple first-week log

Spend one minute a day filling this in:

| Date | Food | Water | Urine clumps | Stool | Energy | Notes |
|---|---|---|---|---|---|---|
| Day 1 | | | | | | |
| Day 2 | | | | | | |
| Day 3 | | | | | | |
| Day 4 | | | | | | |
| Day 5 | | | | | | |
| Day 6 | | | | | | |
| Day 7 | | | | | | |

This helps at the first vet visit. It is clearer than “I think the cat ate less.”

Final note: the first week does not need to be perfect

The first week has simple goals: safety, food, water, litter box use, low stress, and a vet appointment.

If the cat wants attention, fine. If the cat hides, that is not a failure. Give the cat a stable home and time. Trust usually follows.

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References

[^1]: Quimby J, Gowland S, Carney HC, DePorter T, Plummer P, Westropp J. 2021 AAHA/AAFP Feline Life Stage Guidelines. Journal of Feline Medicine and Surgery. 2021;23(3):211–233. doi: 10.1177/1098612X21993657.

[^2]: Cats Protection. Bringing a Cat Home. Accessed 2026-06-11. <https://www.cats.org.uk/help-and-advice/home-and-environment/bringing-a-cat-home>

[^3]: Blue Cross. Bringing Your Kitten Home. Accessed 2026-06-11. <https://www.bluecross.org.uk/advice/cat/wellbeing-and-care/bringing-your-new-kitten-home>

[^4]: The Ohio State University College of Veterinary Medicine, Indoor Pet Initiative. Litter Boxes. Accessed 2026-06-11. <https://indoorpet.osu.edu/cats/basic-indoor-cat-needs/litter-boxes>

[^5]: AAHA. General Litter Box Considerations. 2021 AAHA/AAFP Feline Life Stage Guidelines resource. Accessed 2026-06-11. <https://www.aaha.org/resources/2021-aaha-aafp-feline-life-stage-guidelines/general-litter-box-considerations/>

[^6]: World Small Animal Veterinary Association Global Nutrition Committee. Guidelines on Selecting Pet Foods. Updated 2021-03-10. <https://wsava.org/wp-content/uploads/2021/04/Selecting-a-pet-food-for-your-pet-updated-2021_WSAVA-Global-Nutrition-Toolkit.pdf>

[^7]: Ellis SLH, Rodan I, Carney HC, et al. AAFP and ISFM Feline Environmental Needs Guidelines. Journal of Feline Medicine and Surgery. 2013;15(3):219–230. doi: 10.1177/1098612X13477537.

[^8]: Merck Veterinary Manual. Houseplants and Ornamentals Toxic to Animals: True Lilies. Accessed 2026-06-11. <https://www.merckvetmanual.com/toxicology/poisonous-plants/houseplants-and-ornamentals-toxic-to-animals>

[^9]: Cortinovis C, Caloni F. Household Food Items Toxic to Dogs and Cats. Frontiers in Veterinary Science. 2016;3:26. doi: 10.3389/fvets.2016.00026.

[^10]: Cornell Feline Health Center. Choosing and Caring for Your New Cat. Cornell University College of Veterinary Medicine. Accessed 2026-06-11. <https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/choosing-and-caring-your-new-cat>

[^11]: Stone AES, Brummet GO, Carozza EM, et al. 2020 AAHA/AAFP Feline Vaccination Guidelines. Journal of the American Animal Hospital Association. 2020;56(4):249–265. doi: 10.5326/JAAHA-MS-7123. Also published in Journal of Feline Medicine and Surgery. doi: 10.1177/1098612X20941784.

[^12]: Little S, Levy J, Hartmann K, et al. 2020 AAFP Feline Retrovirus Testing and Management Guidelines. Journal of Feline Medicine and Surgery. 2020;22(1):5–30. doi: 10.1177/1098612X19895940.

[^13]: Cornell Feline Health Center. Anorexia. Cornell University College of Veterinary Medicine. Accessed 2026-06-11. <https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information/feline-health-topics/anorexia>