How to Get Cats to Get Along: Steps, Warning Signs, and Timeline

To get cats to get along, slow the introduction down. Keep the newcomer in a separate room, let the cats learn each other’s scent before they meet, and move on to short, supervised visits only when both stay calm. Many problems between housemates start when the first meeting happens too fast, not because the cats can never share a home.

This guide is general information for cat owners, not veterinary advice. Sudden aggression, hiding, or a change in eating or litter box habits can have a medical cause, so check with your veterinarian when something changes quickly.

Below you will find a step-by-step introduction plan, the warning signs that mean you should slow down, a realistic sense of how long it takes, and ways to keep peace between cats who already live together.

Introduce Cats Step by Step

Start with separate spaces

Give the new cat a room of its own with food, water, a bed, a scratcher, and its own litter box. A spare bedroom or a quiet bathroom works. The resident cat keeps the rest of the house, so neither one has to defend its space on the first day.

Keep the door closed for the first several days. Your cats will hear and smell each other through it, and that is the point. Spend time with each cat separately so neither feels pushed aside.

Swap scents before they meet

Cats rely heavily on scent to size each other up. Rub a clean sock or cloth on one cat’s cheeks and leave it near the other cat’s food bowl. Swap their bedding every day or two, and let each cat explore the other’s room while the other is shut away.

Feed them on opposite sides of the closed door. Start with the bowls far from the door, then move them a little closer each day as long as both cats keep eating calmly. Food builds a good association with the other cat’s scent.

Move to short, supervised meetings

When both cats eat calmly at the door, let them see each other. A baby gate or a door opened a few inches works well. Keep the first visits short, pair them with treats or play, and end each one before anyone gets tense.

• Use a wand toy to keep each cat busy so they can be near each other without staring.
• Give the nervous cat an easy exit, such as an open doorway or a high shelf.
• Lengthen visits only after several calm sessions in a row.
• Go back a step if a meeting goes badly. That is normal, not a failure.

Warning Signs to Slow Down

Some hissing at first is normal. It is a warning, not an attack. Separate the cats and slow the plan if you see any of these:

• Ears flattened back, a puffed tail, or a low, steady growl
• Stalking, chasing, or one cat blocking the other from food or the litter box
• Swatting with claws out, or a fight with screaming and fur flying
• A cat that hides for long stretches, stops eating, or goes outside the litter box

Never break up a fight with your hands. Make a loud noise, or slide a pillow or a piece of cardboard between the cats, then separate them into their own rooms to calm down.

Set Up a Home That Prevents Fights

Many housemate fights are about resources. A common rule of thumb is one litter box per cat plus one extra, placed in different spots so one cat cannot guard them all. The same idea applies to food bowls, water, and beds. Browse litter boxes if you need more, and in a busy multi-cat home a self-cleaning litter box can help keep every box clean enough that no one avoids it.

Height matters too. Many cats feel safer when they can watch the room from above, and a confident cat is less likely to start trouble. Sturdy cat trees for big cats or a floor-to-ceiling cat tree give each cat its own perch, and several cardboard scratchers spread around the house let both cats mark territory without competing for one post.

How Long Does It Take for Cats to Get Along?

There is no fixed timeline. Some pairs settle within days, while others need weeks or a few months, especially with an adult resident cat or a very shy newcomer. Let the cats set the pace, and treat setbacks as a cue to go back one step.

Signs that your new cat is adjusting include eating and using the litter box normally, exploring the house, and resting in the open. Signs the cats are becoming friends include sitting near each other, slow blinks, touching noses, and grooming each other. Many cats never cuddle and still share a home peacefully, and that counts as success.

When to Call Your Veterinarian

Call your veterinarian if a cat that used to be calm turns aggressive suddenly, hides and stops eating, or starts going outside the litter box. Pain and illness can look like a behavior problem. Straining in the litter box, blood in the urine, or many trips with little urine need a call right away, and a male cat that strains without passing urine is an emergency.

If the cats still fight after a slow introduction and a vet visit rules out a medical cause, your veterinarian can refer you to a qualified behavior professional. For more ideas on setting up shared spaces, see the rest of our cat furniture coverage.

Frequently Asked Questions

How do I get two cats to get along after a fight?

Separate them into different rooms and restart the introduction from scent swapping. Rushing back to shared space after a fight usually makes the next meeting worse.

Is hissing normal when introducing cats?

Yes, especially in the first meetings. Hissing is a warning. Slow down if it turns into stalking, swatting, or chasing.

Should I let my cats fight it out?

No. Real fights can cause injuries and build lasting fear. Interrupt safely with a noise or a barrier, separate the cats, and go back a step in the introduction.

Do cats get along better with a kitten or an adult cat?

It depends on personality more than age. A calm adult and a playful kitten can clash, so match energy levels where you can and give the older cat places to get away.

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