The home finally feels settled because your first cat has arranged it to her satisfaction: her routes, her sleeping places, her tray, her claim on your lap in the evening. A second cat does not simply join that arrangement. It renegotiates every part of it, and the honest first question is not whether you want another cat but what the arrival will cost the cat who made the home feel settled in the first place.
Put the Settled Cat's Interests First
Weigh the cost to the settled first cat before you fall for a particular newcomer. A confident, sociable cat who has lived happily with others may take a companion in her stride. An older cat, a cat who has been alone for years, or one who guards resources and startles at visitors may experience a newcomer as an intrusion she cannot escape. Age and energy matter as well: a kitten's relentless play is entertainment to a young adult and harassment to a senior. If your first cat's behaviour around visiting animals, or in a previous multi-cat home, suggests she prefers being an only cat, believe her.
Space and Money for Two of Everything
Work through the practical arithmetic without optimism. You need space for fully separate resources, at least at first and ideally for good: separate feeding stations, water, trays in different locations, scratching and resting places that do not force the cats to compete. A home where the only tray spot, bowl spot and sunny perch are shared bottlenecks is a home where tension has nowhere to drain away. The newcomer also needs a separate starting room of her own, which some homes simply do not have.
The money doubles too: two of everything, vet care included. Food and litter roughly double, but so do vaccinations, dentals, insurance or treatment costs, cattery fees and the price of an emergency. Two cats also age together, so senior costs can arrive together. If the honest sums only work while both cats stay healthy, the sums do not work.
Plan a Weeks-Long Introduction, and Test Before You Commit
Agree in advance on a weeks-long staged introduction plan: a separate room and scent swapping first, feeding either side of a closed door, brief visual contact, then short supervised meetings that end well. Some pairs settle in a fortnight and some take months, and the plan has to survive the slow version without anyone forcing the pace. Rushing introductions to match your enthusiasm is how manageable caution hardens into a genuine feud.
If you want the lowest-risk route, foster-to-adopt is the low-risk way to test the match. Many rescues offer it precisely for homes like yours, and it converts a guess about compatibility into evidence, with an honourable exit if your first cat's quality of life clearly falls. Choose that route with a clear conscience rather than adopting outright and hoping.
Family Sharing through KinsLe helps after the decision too, because relatives who feed or sit for the cats work from identical notes instead of memory.