Signs Your New Cat Is Adjusting | First 24 Hours

Signs Your New Cat Is Adjusting — And What to Expect in the First 24 Hours

Bringing a new cat home is exciting — but the first day can feel confusing if she disappears under the bed, refuses dinner or greets you with a hiss. Here's the reassuring truth: those behaviors are almost always normal signs of adjustment, not red flags. Knowing what to look for helps you support her through the transition instead of worrying through it.

Key Takeaways - Hiding, extra sleep, hissing and skipping a meal are all normal adjustment behaviors in the first 24 hours. - Eating, drinking, using the litter box and emerging to explore — even briefly — are the clearest early signs your new cat is settling in. - Most cats need a few days to a few weeks to fully relax in a new home; patience is the most powerful tool you have. - If your cat hasn't eaten or drunk water in more than 24–48 hours, contact your veterinarian.

The Clearest Signs Your New Cat Is Adjusting

Before diving into what looks alarming, it helps to know what progress actually looks like. Watch for these positive indicators in the first day or two:

• She eats or drinks anything at all. Even a few bites or laps of water signals her stress level is dropping enough to meet basic needs.
• She uses the litter box. This is one of the strongest early signs she's beginning to feel safe in the space https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information.
• She emerges from hiding — even briefly. A quick sniff around the room at 2 a.m. counts. Exploration, however cautious, means curiosity is winning over fear.
• Her body language softens over time. Ears rotating forward, a tail held a little higher, slow blinking — these are feline signals that tension is easing.
• She sleeps in a visible spot rather than the farthest corner. Choosing a slightly more exposed resting place is a quiet vote of confidence in her new environment.

Normal New Cat Behaviors (Not Cause for Alarm)

Approximately 2.1 million cats are adopted in the United States every year, and virtually every one of them goes through some version of this adjustment period. Cats are highly sensitive to environmental change, and the journey from shelter to your home packs a lot of stress into a short window: separation from familiar animals, a carrier, a car ride and a brand-new space full of unfamiliar sounds and scents.

"Cats are naturally nervous creatures, and changes in their environment can be very frightening," says Dr. Joanna Woodnutt, a veterinarian based in the British Channel Islands. "Most cats, on being introduced to a new home, will prefer to hide away for hours or even days."

Because cats are also a prey species, that instinct to stay hidden in unfamiliar territory is hardwired — it's self-protection, not rejection https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information. Here's what that looks like in practice:

Hiding is often the first thing new pet parents notice — and the hardest not to worry about. "Most cats prefer to retreat to a small, enclosed or high-up space and get used to the sounds and sights before venturing out," says Dr. Woodnutt. Let her. Coaxing a hiding cat out before she's ready only resets the clock on her comfort.

Sleeping heavily is equally common. "During the first 24 hours, your cat will be exploring her new environment and sleeping a lot," says Dr. Sara Ochoa, a veterinarian at Whitehouse Veterinary Hospital in Whitehouse, Texas. "Most cats will play and explore and eat, then take long naps and start the whole process over again." That cycle — however slow — is healthy progress.

Hissing in the first day or two is a stress response, not a personality verdict. "Your cat may hiss, but give her a few days and she will learn that you are not so bad," says Dr. Ochoa. Stay calm, move slowly and resist the urge to push for interaction.

Skipping food is worth monitoring but not immediately alarming. "Sometimes the car ride and new adventure will stress cats a little, and they will not eat," says Dr. Woodnutt. "Wet food will help entice them to eat." Offering wet cat food with a strong aroma can make a real difference for a reluctant eater. Ask the shelter what cat food she was eating before adoption and stick with that formula for the first several days — a sudden diet change on top of environmental stress is harder on her digestive system than it might seem https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information.

One non-negotiable: even if she won't eat, make sure fresh water is always accessible and that she is drinking. Dehydration can become a serious concern quickly in a stressed cat. If your cat hasn't eaten or drunk water within 24–48 hours, contact your veterinarian.

How to Help Your New Cat Settle In

You can't rush a cat's timeline — but you can absolutely make the environment feel safer and lower the activation energy for her to start exploring. These steps make a measurable difference.

1. Introduce the litter box first. The moment you arrive home, carry her gently to the litter box and let her sniff it. If she's been in a shelter, she already knows what a litter box is for — she just needs to know where yours is. "The best thing to do is to take your cat to the litter box a few times after you get home and they will know exactly what to do," says Dr. Ochoa.

Follow the Plus One Rule for litter box setup:

• Provide one box per cat in the household, plus one additional box.
• Show her the location of every box in the home.
• If she hesitates at a covered box, remove the door or try an open-top style — some cats feel trapped by enclosed boxes, especially when already anxious.

2. Build in safe hiding spots before she arrives. "Providing lots of hiding places so that your new cat can explore without feeling exposed is a great way to help her settle in," says Dr. Woodnutt. You don't need to buy anything — drape a scarf over a chair to create a tunnel, clear a low shelf for a perch, or tuck a cardboard box on its side in a quiet corner. The goal is to give her options so she never feels cornered.

3. Set up her space before you open the carrier. "Make sure that their bed, water, food bowl and litter box are all ready," says Dr. Ochoa. "This helps them transition into their new life easier." Having everything in place before she steps out means she can begin orienting immediately rather than landing in an unready space.

4. Bring something familiar from the shelter. Before adoption day, ask the shelter if you can take home a blanket, towel or toy that carries familiar scents. "If you can bring a piece of fabric or a towel from the cat's old home to yours, the familiarity may make her feel more secure," says Dr. Woodnutt. Scent is one of the primary ways cats map safety — a familiar smell in an unfamiliar place is genuinely calming.

5. Give her space — and let her set the pace. Don't ask her to meet the kids, the dog or the other cat on day one. Don't pick her up if she's hiding. Sit quietly in the same room, speak softly and let her approach you when she's ready. Every positive interaction she initiates builds trust faster than any interaction you initiate by force.

When to Call Your Veterinarian

Most first-day jitters resolve on their own within a few days to a few weeks. But some signs warrant a call to your veterinarian sooner rather than later:

• No food or water consumed in 24–48 hours
• No litter box use in 24 hours
• Labored breathing, discharge from eyes or nose, or visible lethargy beyond normal sleepiness
• Signs of injury or illness that may have been present before adoption

When in doubt, your veterinarian is always the right call. A quick phone consultation can save you — and your new cat — a lot of unnecessary stress.

Frequently Asked Questions

What are the first signs my new cat is adjusting to her home? Early positive signs include cautious exploration beyond her hiding spot, eating or drinking on her own, using the litter box without prompting, and slow-blinking or relaxed body posture when she notices you. These behaviors signal that her stress response is beginning to ease and she is starting to read her new environment as safe.

How long does it take for a new cat to fully adjust? Most cats begin to show comfort within a few days to a few weeks, though some may take several months to fully settle in — especially if they experienced significant stress before adoption. Hiding and reduced appetite in the first 24–48 hours are normal; persistent refusal to eat beyond 48 hours, or signs of illness at any point, warrant a call to your veterinarian. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

Is it normal for my new cat to hide all day? Yes. Hiding is one of the most instinctive coping behaviors cats use when they feel uncertain or exposed. Providing safe, enclosed hiding spots — such as a covered bed, a draped chair or a cleared shelf — actually speeds up adjustment by letting her observe her surroundings on her own terms. Forcing her out of hiding will slow the process, so give her the space she needs.

My new cat isn't eating. Should I be worried? Mild appetite reduction in the first 24 hours is common and usually tied to travel stress and sensory overload. Offering the same food she ate at the shelter, warming wet food slightly to enhance its aroma, and placing the bowl near (but not inside) her hiding spot can help encourage eating. Fresh water access is critical at all times to prevent dehydration. If she has not eaten at all after 48 hours, contact your veterinarian. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

Why is my new cat hissing at me, and will it stop? Hissing in the first day or two is a stress response, not a sign of a permanently unfriendly cat. She has experienced rapid, disorienting changes — a carrier ride, new smells, new sounds, new people — and hissing is her way of communicating that she needs more time. Avoid direct eye contact, move slowly, speak softly, and let her set the pace for interaction. Most cats noticeably soften within a few days as routine builds trust.

When should I call a veterinarian after bringing a new cat home? Schedule a wellness exam within the first week of adoption even if your cat seems fine — this establishes a baseline and catches any shelter-acquired illness early. Call sooner if you notice: no eating or drinking for more than 48 hours, labored breathing, repeated vomiting or diarrhea, discharge from the eyes or nose, or extreme lethargy that does not improve. When in doubt, your veterinarian is always the right call. https://www.vet.cornell.edu/departments-centers-and-institutes/cornell-feline-health-center/health-information

This article was created with assistance from AI tools and reviewed for accuracy by Petco's content team.