Many people picture the same scene when bringing home a second cat: two animals curled together on the sofa, grooming each other’s ears. Then the new cat comes out of the carrier, the resident arches their back like a Halloween sticker and disappears under the bed for three days. Both scenes are real. The difference lies in choosing the right cat and handling the first two weeks. Rushing them can mean paying for it for months.
First: which cat is a good match?
Cats are not pack animals like dogs, but social individuals who choose their company. They do not accept any random cat, only one who suits them. Shelters and cat rescue groups use these rules of thumb:
- Age: Similar age or a few years' difference at most. A kitten with a twelve-year-old cat is stress for the older one, not company.
- Temperament: Playful with playful, calm with calm. A very active Bengal and a calm British Shorthair often don't get on well together.
- Sex: A tom and a female or two toms often work best, two females can struggle. All neutered, otherwise nothing works.
- History: A cat that has lived with other cats before finds it easier. Rescue shelters often know who gets along with others.
Preparation
Before the newcomer arrives, prepare a separate room with a litter tray, food, water, a cat tree and hiding place. Add resources throughout the home, following the rule of one per cat plus one: two cats, three litter trays, several feeding places, sleeping spots and elevated viewpoints. Cats rarely compete over affection; resources and routes cause most disputes.
Health first: if a cat stops eating, withdraws clearly or loses weight, that is not a normal settling-in process. Go to the vet practice soon, before you carry on.
The plan
Days 1 to 3: completely separate
The new cat stays in her room with the door shut. She should first be allowed to settle in, eat, use the litter tray and hide. The resident cat smells her under the door and knows someone is there. That is enough. You spend time with both, separately. You carry the scent from one cat to the other on a clean cloth, not with unwashed hands. Have the newcomer checked by a vet first (vaccination status, parasites, possible infections), wash your hands between the cats and follow any quarantine or hygiene instructions your vet practice gives.
Days 3 to 7: swapping scents
Swap blankets, cushions and toys. Wipe one cat’s cheeks with a cloth and place it near the other. Both sniffing the items and then sitting on them is a good sign. Hissing at the cloth means allowing a few more days.
Week 2: a barrier in the doorway
Use a baby gate or mesh screen in the doorway so they can see and smell each other without making contact. Give each their favourite food on their own side, initially away from the door, then a little closer each day. Linking the sight of the other cat with eating is the core of the method. Hissing and growling are normal; attacks on the barrier mean increasing the distance.
Week 3: first meetings
Keep them brief and supervised, with a fishing-rod toy and treats. Five minutes, then separate again before tension builds. Increase the time daily. Cats ignoring each other while playing with the toy are on the right track. Cats staring with ears flattened need longer.
Week 4 and beyond
Leave them unsupervised only after several relaxed days in the same room. Keep separating them at night until you are sure. The process takes two weeks for some cats and three months for others. The more fearful cat sets the pace.
What to avoid
- Putting them together straight away to see what happens. A bad first impression is very hard for cats to correct.
- Favouring the new cat. The resident cat now needs more attention, not less.
- Stepping in at every single hiss. A hiss is communication, not a fight. But if the mood becomes tenser (staring, flattened ears, growling, stalking, chasing), calmly separate the two before it comes to an attack: with a cushion or a blanket between them, never with your hands. Afterwards, go back one step in the plan and continue more slowly.
- Giving up too early. Three weeks of hissing is not failure. Three months without progress is a reason to see a cat behaviourist.
When it really is not a match
Some cats simply don't want a second cat, and that happens. Signs after two to three months: one cat marks or keeps avoiding the other. Refusing food, clear withdrawal and weight loss do not belong in this two-to-three-month assessment, but with the vet practice soon. If the conflict continues after the vet has looked into it, returning the cat to the shelter is not a defeat but responsibility. Good shelters explicitly offer this.
When it works
Walking into the living room one morning to find both cats on the sofa, a paw resting on the other without either noticing, is the reward for those weeks with a barrier in the door. For many people, it is also the moment to consider a double portrait. Two cats in one picture can start with two separate photos; we combine them. A larger format is worthwhile for a double portrait: framed canvas gives both room without pushing one to the edge. Our cat portraits also offer posters, wooden frames and acrylic glass.
To go with it: a personalised cat bowl.
Still choosing a name for the newcomer? Our cat name finder can help. To see your first cat’s age in human years, use the cat age calculator.
Before a second cat moves in, consider which type suits your first. That is exactly what “Which Cat REALLY Suits You?” explores. Find it on the books page (book in German).
Further reading
- British Shorthair: the cat who lies beside you: which breed finds it easier
- Maine Coon: ten kilograms of cat in everyday life: a big cat with plenty of calm, usually
- Photographing cats without stress: when you eventually want both in the picture
