Solo Kitten Syndrome: Why Kittens Need Companions

May 1, 2025

When most people think about adopting a kitten, the idea of one tiny ball of fluff purring on their lap sounds perfect. But did you know that raising a single kitten in isolation during its early weeks can lead to behavioral issues later in life? This is known as Solo Kitten Syndrome, and it’s something every cat adopter and rescuer should understand.

What Is Solo Kitten Syndrome?

Solo Kitten Syndrome, sometimes called “Single Kitten Syndrome,” refers to the set of behavioral and developmental problems that can arise when a kitten is raised without littermates. Kittens learn crucial life skills through play and socialization with their siblings—such as boundaries, bite inhibition, and how to interpret body language.

Without this essential interaction, solo kittens often grow up to display problematic behaviors like:

• Over-aggression during play

• Poor social skills with other cats; bothering older cats in the home

• Difficulty adapting to new environments

• Excessive vocalization or neediness

• Inappropriate biting or scratching; biting feet or ankles

As explained by Hannah Shaw, also known as The Kitten Lady, “Kittens who grow up without the presence of siblings often lack the ability to play gently or understand feline boundaries” (Kitten Lady Blog).

The Science Behind It

According to the National Kitten Coalition, the critical window for kitten social development is between 2 and 7 weeks of age. During this time, kittens engage in rough-and-tumble play that helps them learn how to control their claws and teeth and navigate feline communication. Missing out on this period can have long-term effects on behavior (NKC: Single Kitten “Syndrome” Behaviors).

Veterinarians and behaviorists alike recommend adopting kittens in pairs or ensuring solo kittens have plenty of early socialization, either with other kittens or playful adult cats.

Why We Recommend Adopting in Pairs

At Maria Meows, we’ve seen firsthand the difference that proper kitten companionship can make. That’s why we advocate for adopting kittens in pairs, especially when they're under 12 weeks old. Not only do kittens keep each other entertained, but they also become better-adjusted, more confident adult cats.

The ASPCA also supports this approach, noting that “a pair of kittens will teach each other how to be cats” and are generally happier and easier to manage than a solo kitten (ASPCA: Why Two Kittens Are Better Than One).

What If You’ve Already Adopted a Solo Kitten?

If you already have a single kitten, don’t worry—you’re not doomed to a life of shredded furniture and midnight zoomies. But it does mean you’ll need to provide extra enrichment, playtime, and patience. Consider:

• Scheduling multiple daily play sessions with wand toys or interactive games

• Offering puzzle feeders and solo toys to prevent boredom

• Introducing a second kitten or playful adult cat when appropriate

• According to Jackson Galaxy, behavioral training and gentle redirection can also help solo kittens learn limits. If you're struggling, call us or consult a feline behaviorist for personalized guidance. (Jackson Galaxy YouTube)

Final Thoughts

While it may seem counterintuitive, two kittens are often easier than one. They wear each other out, learn from one another, and grow into better-balanced cats. Understanding and preventing Solo Kitten Syndrome can improve not only the life of your kitten, but also your overall experience as a cat parent. And the sanity of your older cats!

Ready to adopt? Check out our available kittens—we’d love to help you find the purrfect pair! Fill out our adoption app to get started.

Sources: “Single Kitten Syndrome.” The Kitten Lady; "One Is the Loneliest Number." National Kitten Coalition; “Why Two Kittens Are Better Than One.” ASPCA News; "How to Get Your Cats to Stop Everything You Hate." Jackson Galaxy YouTube.