How to Introduce a Second Cat

The biggest mistake in adding a second cat is speed. Cats are territorial by nature, and a bad first meeting can set the relationship back for months. The good news is that the correct method is simple: go slowly, let scent do the early work, and let the cats set the pace.

Start with separate rooms

Keep the new cat in its own room with food, water, a litter box, and a hiding spot. The resident cat keeps the rest of the home. For the first days, they hear and smell each other through the door without ever meeting — and that's exactly what you want.

Swap scents before faces

Exchange bedding, or rub a cloth on one cat and leave it with the other. Feed them on opposite sides of the closed door so each associates the other's scent with something good. When the hissing and posturing at the door calm down, you're ready for the next step.

Short, supervised looks

Open the door a crack, or use a baby gate, for brief supervised sessions. End every session before tension builds. Over days or weeks, gradually extend the time and the openness. There is no schedule to hit — the cats decide when they're ready.

The bottom line

Separate rooms, scent-swapping, and short supervised meetings. If you feel like you're going too slowly, you're probably going at the right speed.

General guidance, not veterinary or behavior advice.