Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Single Kitten Syndrome: What Is It? Vet-Reviewed Facts & Myths

persian kitten playing on carpet

Single kitten syndrome refers to behaviors sometimes displayed by kittens adopted alone into a single-cat household or who, for whatever reason, go through kittenhood without littermates or other feline companions.

Though not officially recognized, it’s clear to many rescue organizations that single kitten syndrome is a very real thing and that it sometimes affects successful adoptions. For this reason, it’s important to get clued up on single kitten syndrome if you’re thinking about adopting a fluffy friend sometime soon.

divider cat faces 2 oct 2024

What Is Single Kitten Syndrome?

Often, when you’re in talks with a rescue organization about adopting a kitten, you’ll find that they recommend adopting a pair rather than a single kitten. For some organizations, it’s a cast-iron requirement that cats under a certain age don’t go to their new homes alone. There’s a good reason for this.

When kittens are raised alone without companions, they miss out not only on important social interactions but also essential lessons in how to socialize and play appropriately. In a litter, kittens give one another feedback, which means their responses to certain behaviors help instill in one another what’s acceptable and what is not.

For example, if one kitten plays too roughly with another and hurts them, the other kitten may cry out, and the mother of the litter will often jump in to correct the inappropriate behavior. These cues from mom and their brothers and sisters teach the kittens that what they’re doing is not okay and won’t be tolerated.

If a kitten doesn’t have these kinds of interactions and corrections, they sometimes carry inappropriate behaviors like biting into adulthood and direct them toward humans. In addition to learning to play nicely, kittens learn how to use the litter box by following what their mom and littermates do.

mother and child adopting cats from the shelter
Image Credit: BearFotos, Shutterstock

What Are the Signs of Single Kitten Syndrome?

Single kitten syndrome manifests itself in a variety of unsavory ways, and most are related to how they interact with humans. Unfortunately, some adopters opt to return their kitties with these problem behaviors as they don’t know how to manage them. Cats with this “syndrome” will likely display some or all of the following behaviors:

Note: Not every kitten that is adopted alone will display these behaviors—most adapt very well to their new homes without any problems. Each case is unique, and organizations tend to treat each one as such when deciding what kind of home or living situation would be best for an individual kitten or cat. 

  • Biting hard during play
  • Using claws during play
  • Excessive clinginess
  • Biting your ankles when you walk by or walk away
  • Chewing objects around your home
  • Scratching furniture or other objects they shouldn’t scratch
  • Going to the bathroom outside the litter box
  • Suckling on fabrics and sometimes even on you or other pets
  • Attention-seeking
  • Excessive vocalizing

If your pet is showing these signs, we suggest you speak to a vet.

If you need to speak with a vet but can't get to one, head over to PangoVet. It's an online service where you can talk to a vet online and get the advice you need for your pet — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

What Are the Causes of Single Kitten Syndrome?

In a nutshell, single kitten syndrome is believed to be caused by a lack of social interaction with other cats at a young age, and there are several reasons why a kitten may miss out on these interactions. One example is if a kitten is found orphaned and is fostered in a home without any other kitties.

Most cases of reported single kitten syndrome, however, involve kittens who are adopted alone and go to a home without kittens of a similar age. Even if a kitten has been raised as one of a litter or with similarly aged companions, the socialization process isn’t over once a kitten goes to a new home. Adopted alone, they may feel lonely in their new homes, especially if their human companions spend several hours a day away from home.

Furthermore, even if you already have an adult cat at home, this can’t always provide your kitten with the type of socialization they need due to a mismatch in energy levels, but this depends on the personalities of the individual cats. Some cats remain very playful into adulthood and welcome new friends to play and snuggle with, whereas others may quickly get fed up with the new kitten’s (sometimes impolite) invitations to play.

The same goes for homes with dogs. Some cats and dogs get along like a dream and play together frequently—which is great for both of them and helps prevent loneliness and stress—but dogs and cats don’t learn the same behaviors (like using a litter box), so the dog can’t really model all the appropriate behaviors for your kitten.

Unfortunately, there isn’t currently any research that backs up the existence and therefore causes of single kitten syndrome. In fact one recent study didn’t actually find a link between early social exposure and aggression and reported that the majority of factors associated with aggression were related to the cat’s personality, home environment and training methods.

Kitten eating food from bowl
Image Credit: Gladskikh Tatiana, Shutterstock

How Do I Care for a Kitten with Single Kitten Syndrome?

Of course, this depends on the advice offered by the rescue organization, but if they think it would be in the kitten’s best interest, please consider adopting two together. If you’ve already adopted a single kitten but have decided you want to adopt a companion for them, it’s not too late to reach out to a rescue organization.

Some people are put off because of the extra responsibility involved in parenting two cats, but you may reap rewards in other ways—kittens with companions have an outlet for their energy and are less prone to loneliness, which means better behavior and a more relaxed household overall. In that sense, two kitties could well be easier than one!

The most important thing is to communicate with the rescue organization to ensure the best human-kitty match possible. As mentioned above, adoptions are treated on a case-by-case basis depending on what’s best for the individual kitten.

If adopting two kittens really isn’t an option for you, you’ll need to make sure your kitten has plenty of opportunities for mental stimulation and play. You’ll also need to instill a sense of boundaries in your kitten to help teach how to interact appropriately. Here are some tips:

  • Play with your kitten regularly with toys like chaser wands (they can’t get near your hands if you use these).
  • Redirect aggressive behaviors onto a toy.
  • Use puzzle feeders to keep your kitten busy, especially if you’re going to be out of the house for a while.
  • Don’t encourage your kitten to bite your hand. It might not hurt while they’re kittens, but it’s a whole other story if an adult cat does it. Immediately take your hands away if this happens and tuck them under your armpits.
  • If your kitten is biting you and won’t stop, calmly get up and walk away to show them you won’t engage with them when they’re doing that.
  • Provide cozy, safe spaces to help your kitten feel secure.
  • Start litter box training straight away by regularly placing your kitten in the box. Move the (clean) litter around with your hands to show them how to paw at it. Reward them when they use the box. Put the box in a quiet, calm, easily accessible, well-lit area.
  • Make sure everyone in your home is on the same page in terms of not encouraging aggression.
woman-playing-with-her-cat
Image Credit: Dora Zett, Shutterstock

divider cat faces 2 oct 2024

Frequently Asked Questions (FAQ)

What If the Rescue Organization Won’t Let Me Adopt Only One Kitten?

Some rescue organizations make it a requirement that kittens are adopted in pairs, though some might make exceptions in certain cases if it’s best for the kitten in question.

Whatever the rules of the organization, respect them—they’re in the kittens’ (and therefore your) best interests and are in place for good reason. If a pair is a no-no for you, you might want to consider adopting an older kitten or an adult cat. Work with the organization to find the best match for you—they’re there to help.


What Are the Benefits of Adopting Two Kittens?

As explained above, kittens learn important social lessons from one another so they can grow up to be well-rounded and non-aggressive (and therefore more trainable), but they also provide one another with companionship.

They play together, snuggle together, and groom one another, which gives each kitten a sense of security and takes some of the pressure off you (plus, it’s adorable to watch). Best of all, adopting two kittens means two lives are saved.

divider cat faces 2 oct 2024

Conclusion

While there may not be any scientific evidence of single kitten syndrome, many rescue centers believe that it can be very damaging long term and incredibly stressful for both you and your cat. For this reason, if a rescue organization recommends or requires that you take two kittens, please consider it. Alternatively, there are plenty of sweet older kittens and loveable adult cats that would be thrilled to be the only pampered prince or princess in your home!

See Also: 


Featured Image Credit: Zarubina_Yuliya, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Is Best Western Pet Friendly? (2025 Guide)

When you’re traveling but have pets, a whole new set of problems comes up. Perhaps the biggest and most important is what hotels...

Siamese Munchkin Cat Mix: Info, Pictures, Temperament & More

If you’ve ever seen a Siamese kitten, you’re familiar with how adorable they are and their tiny paws, noses, ears, and bodies. Of...

Do Cats Need Professional Groomers? Vet-Reviewed Cleaning Facts & Tips

Grooming is a must for all cats, long-haired and short-haired alike, but do cats need to be professionally groomed? Not necessarily. You can...

Cats and Tornadoes: 8 Vet-Reviewed Tips for Keeping Your Pet Safe

Tornadoes are one of the worst weather disasters that can befall a community. Bad twisters can flatten entire neighborhoods in a matter of...

More related

Why Do Cats Like Hiding in Dark Places? 5 Vet-Reviewed Reasons

Cats love to hide behind furniture, in boxes, and under just about any object they can fit beneath. They are so stealthy you...

How to Tell if Your Maine Coon Cat is a Mix (With Pictures)

Maine Coons are known as the gentle giants of the feline world. They’re gigantic compared to most house cats, reaching weights of up...

11 Health Benefits of Cat Grass: Vet-Reviewed Facts & Tips

Cat grass is a popular addition to many cat households, offering a variety of health benefits for our feline friends. In this article,...

5 Creative DIY Cat Window Guard and Screen Protector Plans (With Pictures)

Most cats enjoy nothing more than lounging by a window and enjoying the sun. Their favorite spot might worry you because of their...

Keep reading

Can Stress Give a Cat Diarrhea? Vet Approved Signs, Causes & Treatment

Stress can undoubtedly cause cats to have gastrointestinal problems, including diarrhea. Although diarrhea can be triggered by stress, the condition can also be caused by various medical problems. Therefore, it is crucial to have the issue evaluated by a veterinarian...

Ginger cat in blue litter box

Why Does My Cat Need Mental Stimulation? 7 Vet-Approved Reasons

Cats are quite curious and inquisitive by nature, so they require a significant amount of mental stimulation to satiate their curiosity and keep them happy. Along with keeping them engaged, mental stimulation can also boost a cat’s mood, increase their...

two cats playing with toy at home

Can Cats Eat Tomato Sauce? Vet-Reviewed Nutrition & Safety Guide

It’s dinner time, and you’re serving up your signature dish of spaghetti with jarred tomato sauce because who has time to make tomato sauce from scratch? A dollop of sauce accidentally hits the floor, and your cat, waiting patiently by...

Can Cats Eat Tomato Sauce

Does Heat Kill Fleas on Cats? Here’s What Science Says

If your cat has fleas, they can be a nuisance and are incredibly difficult to get rid of without flea treatments. But these treatments can be expensive, so many pet owners are left wondering how to treat fleas on their...

Cat with fleas

Siamese Cat Health Problems: 7 Vet-Reviewed Issues

Siamese cats are among the most popular cat breeds in the United States. They are intelligent, vocal, affectionate, and have dog-like personalities. They are also strikingly beautiful with piercing blue, almond-shaped eyes. With these amazing characteristics, it’s no wonder they...

Catster_Health Problems of Siamese Cat

6 Best Dry Cat Foods in Australia in 2025 – Reviews & Top Picks

Choosing the right food for your cat is one of the best ways to ensure your kitty’s health and longevity. It can be confusing to pick a cat food with so many brands, and many of them use marketing ploys...

grey cat eating food

Vestibular Disease vs. Stroke in Cats: What’s The Difference? Vet-Approved Insights

Strokes in cats are very rare. The symptoms that cat owners most often associate with a “stroke” in cats result from vestibular disease. However, veterinarians may describe the vestibular disease as a “stroke” to aid the pet parents in understanding...

vet holding burma cat

Why Is My Cat Missing the Litter Box? 11 Vet Reviewed Reasons & Advice

If your feline is missing the litter box, it can quickly become very annoying. You’ll have to clean around the litter box as well as clean out the litter box. It may even seem like your cat is missing the...

maine coone in litter box