People keep cats for a mix of practical and emotional reasons: they’re low-maintenance compared to dogs, they fit easily into small living spaces, they cost less to care for, and they offer genuine companionship without demanding constant attention. About 73.8 million cats live in American homes as of 2024, with nearly a third of all U.S. households owning at least one.
Cats Fit Modern Lifestyles
The single biggest reason cats appeal to so many people is convenience. Cats don’t need to be walked, they groom themselves, and they instinctively use a litter box with no training required. For anyone who works long hours, lives in an apartment, or simply doesn’t want to bundle up for a walk in freezing rain, that matters enormously. A cat can be left alone for a full day, or even overnight with enough food and water, without the anxiety that comes with leaving a dog unattended.
Dogs typically need at least four walks a day in an apartment setting, 60-plus minutes of active play, regular training sessions, and professional grooming every four to six weeks. Cats need a clean litter box, food, and some interactive play. The daily time commitment is a fraction of what a dog requires, which makes cats especially appealing to people with demanding schedules or limited mobility. If you adopt two cats, they’ll often entertain each other, reducing the need for you to provide stimulation throughout the day.
They Cost Significantly Less
The financial gap between cats and dogs is real. Annual cat care runs roughly $710 to $2,865, while dog ownership costs $1,000 to $5,225 per year. The biggest difference is food: dog food runs $560 to $4,115 annually depending on the dog’s size, while cat food costs $450 to $1,860. Dogs also come with expenses cats simply don’t have, like flea and tick prevention ($225 to $265), poop bags ($65 to $85), license renewals ($20 to $125), and professional grooming. Cats do require litter ($150 to $720 a year), but even with that factored in, they’re the more affordable pet by a wide margin.
The Companionship Is Real, If Quieter
Cats have a reputation for being aloof, but most cat owners will tell you that’s a misread. Cats bond with their people. They just do it on their own terms, which is part of the appeal. A cat that chooses to curl up in your lap or headbutt your hand feels like it’s offering affection voluntarily, not out of pack instinct or desperation.
The research on whether cats reduce loneliness is more nuanced than you might expect. A systematic review of pet ownership and social isolation found that cat ownership wasn’t consistently linked to lower loneliness scores in the way dog ownership sometimes is. Dogs tend to create social opportunities (walks, dog parks, encounters with strangers), while cats don’t push you out the door. During the COVID-19 pandemic, one study found cat owners were less likely to feel isolated than dog owners, but other studies found no significant difference. What the data suggest is that cats provide a different kind of companionship: quiet presence, routine, and warmth, rather than the socially outward connection dogs facilitate.
Health Benefits of Living With a Cat
Cat ownership is associated with a notably lower risk of cardiovascular disease. A study published in Frontiers in Veterinary Science found that cat owners had a 44% lower risk of cardiovascular disease compared to non-cat owners. Interestingly, dog ownership showed no similar association in the same analysis.
Part of this may come down to the calming effect of simply being around a cat. When people interact freely with their cats, their emotional arousal tends to decrease. Most participants in one study showed elevated oxytocin (the hormone linked to bonding and relaxation) after spending time with their cat, though the increase varied widely between individuals and wasn’t statistically significant across the group. The stress hormone cortisol didn’t consistently drop either, suggesting the health benefits may accumulate over months and years of daily companionship rather than appearing in a single petting session.
Then there’s purring. A cat’s purr vibrates at a frequency between 25 and 150 hertz, a range that overlaps with frequencies used in therapeutic medicine to reduce inflammation, improve circulation, and stimulate tissue repair. These vibrations have been shown to promote bone cell regeneration and increase bone density. It’s not a substitute for medical treatment, but living with a purring cat on your chest most evenings may offer a low-grade therapeutic effect over time.
Cats May Strengthen Children’s Immune Systems
For decades, parents were told to keep cats away from babies to prevent allergies. That advice has largely reversed. Multiple large studies now show that children who grow up with a cat during their first year of life have a 20 to 30% lower risk of developing allergic disease. One systematic review found that early cat exposure was associated with a 21% reduction in the risk of allergic sensitization or eczema.
There’s no convincing evidence from large prospective studies that living with a cat during infancy increases a child’s risk of becoming allergic to cats or to any other allergen. The current understanding is that early exposure helps train the immune system to tolerate common allergens rather than overreact to them.
A Partnership 15,000 Years in the Making
The human-cat relationship didn’t start with affection. It started with mice. As far back as 15,000 years ago, wild cats began hanging around human settlements in the Levant (modern-day Israel, Lebanon, and Syria) because those settlements attracted rodents. Hunter-gatherers stored food, mice moved in to eat it, and wildcats followed the mice. Humans tolerated the cats because they kept the pest population down. It was a mutually beneficial arrangement that required no training, no leashes, and no cages.
When agriculture emerged and grain storage became central to survival, the relationship deepened. The earliest cat remains found near human settlements date to early farming communities, and by about 9,500 years ago, people on Cyprus were deliberately transporting cats to the island alongside other animals. A cat was buried alongside a person in one large farming village, hinting at something beyond mere pest control. By 5,800 years ago, cats appeared in elite burial sites in predynastic Egypt. Full domestication, where cats lived as family members and featured in art and religion, is generally dated to about 4,000 years ago in Egypt.
What’s remarkable is how little cats have changed through domestication compared to dogs. They weren’t selectively bred for specific tasks. They essentially domesticated themselves by showing up where food was and being useful enough that humans let them stay. That independent streak, the quality that sometimes frustrates new cat owners, is baked into the entire history of the species. Cats have always chosen to be near us rather than being forced into it, and for many people, that voluntary closeness is exactly what makes the relationship feel meaningful.