An older gray cat asleep on a couch.
An older gray cat asleep on a couch. Photography by bbbrrn/Thinkstock.

5 Things to Know About Bringing an Adult Cat Into Your Home

Adopting an adult cat? Awesome! An adult cat poses different challenges than a kitten. Behaviorist Marilyn Krieger highlights a few issues you might encounter when adding an adult cat to your home — and how to overcome them.


Bringing a new adult cat into your home poses different challenges. Marilyn Krieger, certified cat behavior consultant ( and author of Naughty No More!, shares her expertise for recognizing and managing behaviors and helping your new companion to better “feel the love.”

1. Newly adopted cats often hide and shun their new people.

A cat hiding under the covers.
Adult cats might be more prone to hiding when you first adopt them. Photography by Julie Vader / Shutterstock.

“They need to have their own quiet rooms where no other resident animals are allowed,” Marilyn says. “Help him emerge by creating a safe and secure space with boxes to hide in, vertical territory to climb, scratching posts, comfortable sleeping spots, food, water and a litter box.”

Never force a shy adult cat to socialize, Marilyn adds. “Leave him alone at least for the first 24 hours so he can explore his space alone,” she says. “After he’s accustomed to his new space, one person can enter the room and sit on the floor. Make positive associations and connections through food, play, a clean litter box, etc.”

2. Resident cats commonly fight with newcomers.

“Cats are territorial and understandably don’t readily accept new cats,” Marilyn says. “People often make the mistake of introducing newly adopted cats to the resident pets too quickly. Once a new cat is used to his rooms, introduce him to the resident animals slowly. Often it can take a month or longer.”

3. The new cat doesn’t want to be petted.

Never corner, pick up or pet a cat against his will, Marilyn says. “Instead, crouch at a distance and point your index finger at cat-nose level toward him,” she adds. “If he wants to say hello, he will come to your finger, touch it with his nose and turn his head and rub you with his cheek. If he starts to feel a little insecure, he’ll retreat. Other opportunities will come as he feels more secure. Delicious cat treats and food can be effective persuaders!”

4. The new cat won’t eat.

“Depending on the level of stress, many cats stop eating when first introduced into the new home,” Marilyn says. “If a cat doesn’t eat for 24 hours, he needs veterinary intervention. Encourage eating with a good quality, highly aromatic food heated up to room temperature. Find out what treats/food the cat enjoyed before surrendered. Sprinkling the food with dehydrated chicken or another meat sometimes jump-starts an appetite. Place the food bowl in a quiet, easily accessible area. Cats who hide may start eating if their food dish is put at their hiding spot entrance. Give the newbie some privacy; often they will eat when no one is around.”

5. What can new owners do to stop unwanted behaviors?

Cats always have reasons for their behaviors — they don’t happen in a vacuum, Marilyn says. “Many things cause unappreciated behaviors — medical issues, history, poor litter box management, household turmoil, how the cat is approached and handled, inter-cat issues and many others.” Any behavior change requires a visit to the veterinary clinic.

“Only after all possible medical causes have been ruled out should the problem be approached as behavioral,” Marilyn says. “Change the behavior by identifying its causes and addressing it through environment and behavior modification. Punishing cats for undesirable behaviors causes stress and often escalates behaviors, creates other problem behaviors and strains or breaks the human-animal bond. Veterinary behaviorists and certified cat behavior consultants can help figure out unwanted behaviors and offer solutions.”

Thumbnail: Photography by bbbrrn/Thinkstock.

Tell us: Have you ever adopted an adult cat? What challenges did you face? How did you acclimate him to your home and other resident cats?

Editor’s note: This article appeared in Kittens, a special issue from Catster magazine. Look for Kittens on a newsstand near you! 

Read more about brining a new cat home on

12 thoughts on “5 Things to Know About Bringing an Adult Cat Into Your Home”

  1. I saved a "kitten" off the street who was about a year old when he first came to me. He was just a little bag of bones, almost dead from hunger and dehydration. Made me want to cry. So I bring him home and now I've got catfights between him and my other tom who is 7 years older and the boss of the house. For the first 3 months I had CATFIGHTS IN THE HOUSE! Solution and the reason I'm writing about this story: A squirt bottle set to a stream and filled with water will positively break up a cat fight in A HEARTBEAT!! Well, that was about 4 years ago and the two are now tolerant of each other, with #2 even licking the head of #1 at times. The boss definitely knows his place though. Like owning me when I'm in bed. But even that is very slowly getting better, although #1 would definitely prefer it if #2 would stay off the bed completely! I find cats to be fascinating. Mine have specific places they nap in, depending on what time of day it is.

  2. I recently started working from home a few months ago after years as a road warrior and was thrilled that I could finally have pets. I took in a friend’s 2 year old female rottweiler with hind leg problems. She is young and active but only to a degree because of her hind legs. Now another friend has asked me to take in her 13 year old female ragamuffin as her child cannot be around it, so she is home with me on a trial basis.
    The dog has lived with cats and when we meet one at the vets or on a walk she is interested but not overly so. Just wants to sniff and then forget about them. The cat is very sweet but has never been around dogs and seems terrified. I have them separated, but wonder if this will work out. I am more worried about the cat adapting than the dog.

  3. My cat adopted me! I’ve been putting out food for the ferals in my backyard for over four years. When winter came, I got a shelter from a rescue organization. A second and third joined it.

    One of my regular customers embarked on a campaign to become a house cat. I wasn’t hard to convince, but my husband grew up in an animal-free house and stated emphatically that he didn’t want a cat in the house. I got him to relent “in case of bad weather, but only in the basement.”

    Meanwhile, “Soot” started escorting me from the backyard to the side door and it wasn’t long before he was watching for my husband to leave for work in the morning. As soon as Hubby was gone, he’d be sitting on the side door stoop, waiting to come in. He’d go back outside for breakfast, but as soon as he was done eating, he’d be scratching on the door. If Hubby came home early, Soot would wait until he wasn’t looking and streak for the exit.

    Once he got used to the house, he pretty much curled up by the heating vent in my office and slept all day. He preferred to go outdoors rather than use a litter box, but as soon as he was done, he’d be back at the door.

    Then he stepped up his game last summer. If it was pouring rain, he’d leap from the back gate to my office window sill and peer in, looking pathetic. Hubby reluctantly allowed him indoors to wait out the weather. And it wasn’t long before the ‘basement rule’ fell by the wayside.

    Last November, I needed a relatively minor surgical procedure. I arranged for the neighbor kids to feed the ferals. My mother came in for a few days to help me recuperate. My first day home, she went to the bakery. When she came back, Soot was on the front step. And when she walked past him to open the door, he raced inside, looking for me.

    About a week later, my husband said, “I think we have a cat. Now we need to take him to the vet.”

    It took a couple of weeks more before we made the appointment, but that was only because I wanted to make sure I could get him into the carrier first. We found out he had some minor issues (eye infection, behind on vaccines) and a major one (FIV positive). And he needed dental work. We took care of it.

    I’m positive that he must have had a home at some point. He’s adjusted too well not to have. At some point before we met, he was TNR’d and he spent three winters in one of my shelters, so I know I haven’t abducted anyone’s current pet. And he’s extremely vocal, which is unusual for a true feral. These days, he’s loving, playful, getting better around new people all the time, and in the best health he can be, all things considered.

  4. I adopted a wonderful blackish-brown cat (Burmese?) who is a spayed and declawed female and is 8 years old. From the beginning, She has been very affectionate and playful with me, but even after 12 weeks, she rarely leaves the bedroom and is fearful of my husband. He is soft-spoken around her and always offers her treats and toys, but she hides from him. I also have several pheromone dispensers around the house. Is there anything else I can do to help this cat overcome her fear of both the main part of the house, and of my husband?? I’ve had cats most of my life, but they have all been younger. Was I wrong to try to adopt an older cat who may have a history that I can’t understand or overcome? Thank you!

  5. We moved into a house where my brother’s cat lived for 6 years about a year ago. My cat gizmo started spraying in a few areas and in the past 3-4 months it got worse! He would spray on vertical surfaces around the house. I used the pheromone spray to calm him down. Cleaned the soiled areas real good. Kept all doors closed. I couldn’t take it anymore so I just brought him to the vet and health issues were ruled out. The vet prescribed some progesterone pills that I have yet to give him so he’s not anti-territorial. Today, I converted our master bath into his “home” with his stuff. He seems comfortable and I will slowly expand over time after he stops spraying in there. This is my first step to change the environment. Do you have any advice here or anything else?

    1. Hi there — 

      Sorry to hear you’re experiencing this! We suggest keeping in contact with your vet about this issue. These pieces might help provide some insight, too:

  6. Seriously, take your cat to the vet like yesterday. All the new, non-allergy symptoms could be due to something treatable. That much weight loss and behavior changes are big read flags that he needs to be checked out.

  7. We adopted a year old cat from a breeder and had him neutered. Six months later we got a 12 week old kitten. We have gradually introduced them over the last two weeks. They run and wrestle constantly- I guess this is just normal- but the older kitty has a defect in his nose and tires more easily so I separate them after 30 minutes- do this about 2 or 3 times a day.All this wrestling seems pretty intense and I am afraid one will hurt the other- so far no one has cried out. Should I be concerned?

  8. I adopted 2 adult cats just over a year ago. I was intending to get just one but they were best buddies at the rescue Center so ended up with both! One was about 2 and very shy, he hissed and hid when I met him. The other is older and as friendlier. As I live on my own in a small house they had the run of downstairs when I first brought them home but didn’t go upstairs. Mark (the older cat) soon settled and within a few weeks was sitting on my knee. He now runs to greet me when I come in, sits on my knee the minute I sit down and sleeps on my bed! Kitkat the younger cat hid under a chair for the first couple of months only coming out when I was in bed or at work. Gradually he started coming out at feeding time and in the evening, but would come nowhere near me. I used to sit on the carpet and make a fuss of Mark and play with him and I think that helped Kitkat gain trust in me. At this point I let the cats have the run of the house. It took about 7 months before Kitkat would let me stroke him in his bed and a little longer before he sat by me on the sofa. He is now a real snuggle bug and cuddles up quite happily. Once Kitkat became comfortable in my company I installed a cat flap and they both come and go as they please. Kitkat loves being outside and is becoming quite the hunter! Mark tends to laze around and not go too far. They are still best friends.

  9. My cat Snowball has those allergy scabs. It is so terrible. Touching him make me cringe. It has improved. Snowball is about 13 years old. Lately he want to sleep with me, he has to be touching me or he get cross and hisses, even bites if I try to move him. He has never hissed, scratched or bitten before. Also he use to be a fatty. Now he is getting skinny, I can feel his bones, his eyes are red around lower and upper lids. I he dieing?I think he is.

    1. Hi Pamela — 

      Please take your cat to the vet ASAP. It sounds like he has something serious! Hope he feels better.

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