Is it normal for a cat to hiss at a new cat?
Daniel Moore
Published Jan 24, 2026
Don't be alarmed; it's normal for cats to hiss at something new or something they don't understand. Hissing is a distance-increasing behavior. Simply put, it's a warning saying, “Please back off, and do not come any closer.”
How do I get my cat to stop hissing at my new cat?
Jealousy is a normal reaction. Don't yell, scold or punish your current cat for hissing at the newcomer. When he acts nice—or at least nonthreatening—to the new cat, praise him and give treats. If fighting breaks out or either cat is highly stressed, separate them for a few more days.
How long will my cat hiss at the new cat?
Separate them if the hissing doesn't die down after 1 or 2 minutes or if there is any sign of threat (swatting with force, chasing, screaming, ears flattened, etc.). Try again when the cats seem to be calm. If it takes more than seven days for the hissing to stop, things need to go more gradually.
How long does it take a cat to get used to a new kitten?
It can take several weeks to several months for a cat to get used to a new kitten—and even longer for them to become "friends." Some cats will learn to tolerate a newcomer, but may never be interested in playing or napping together. In other cases, the cat will take to the kitten right away.
Should I let my cat hiss at the new kitten?
Allow Your Cat to Establish a Hierarchy
Your older cat may hiss and swat at the kitten when the newcomer does something unfavorable. This is completely normal and as long as it is just hissing and swatting, do your best to not interfere.
24 related questions foundHow do I get my old cat to like my new cat?
How Do I Get My Older Cat To Like My New Kitten?
- Keep the new kitten isolated and feed both the older cat and kitten close the door. ...
- Prop the door enough that they can see and smell each other. ...
- Bring your older cat into the room with the kitten. ...
- Increase the time the cats spend together by 5 or so minutes each day.
Will my cat accept a new kitten?
Adult cats will usually accept a new kitten much more easily than they will accept a new adult cat. Cats are territorial, and your cat may resent an adult feline intruder. If you're able to choose from a group of kittens, avoid a kitten that's hissing, growling or engaged in serious battle with his mates.
Why is my female cat hissing at my male cat?
Depending on where your cat spends his time, he may view your whole neighborhood as his territory. Female cats can be just as territorial as males. The behavior patterns in this type of aggression include chasing and ambushing the intruder, as well as hissing and swatting when contact occurs.
Can cats get depressed with new kitten?
But remember, never force it! Cat depression after a new kitten becomes part of the family is common. Cats don't respond well to change and can feel like their territory and favorite people are being taken from them. This manifests as behavioral changes.
How do I know if my cat is depressed?
Signs of a Depressed Cat
The following are some classic signs of depression in cats: Loss of appetite or changes in feeding habits. Changes in body language, including ears held back, tucked tail, and hairs standing on end. Meowing more or less than usual or making low-pitched, mournful meows.
Should I let my cats hiss at each other?
Don't be alarmed; it's normal for cats to hiss at something new or something they don't understand. Hissing is a distance-increasing behavior. Simply put, it's a warning saying, “Please back off, and do not come any closer.”
Should I hiss back at my cat?
You should not hiss at your cat as it will scare the little pet and will eventually scared of coming in front of you. Movement, eye contact, tail and head bumps, and hissing are all ways cats communicate. When you mimic your cat's language, they'll notice when they're doing anything wrong sooner.
How do I get my older cat to stop hissing at my new kitten?
New kitten? Ask a vet anything — for free
- Older cats don't like change. ...
- They're territorial. ...
- They miss being the center of attention. ...
- Use pheromones. ...
- Try supplements. ...
- Prepare your home. ...
- Give your new cat their own space. ...
- Make sure your older cat is healthy (and vaccinated)
How long will my cat hiss at my kitten?
In most cases, the hissing will only persist for a few weeks. Cats will quickly adapt to their new normal and realize that their new roommate is in fact a friend. However, this does depend on how the cats are introduced to each other. Do it correctly and you'll soon see the hissing stop.
Why did my cat hiss at a kitten?
If a kitten is jumping on a cat or trying to entice them to play when they aren't feeling like it, hissing is a common result. Sometimes, older cats hiss at kittens just to establish dominance. The cat is letting the newcomer know that they're the boss.
What if my cat hates my new kitten?
If either party appears aggressive, fearful or just unsure, don't force the interaction. Separate them again and continue with scent swapping. Cat and/or kitten may vary with their reactions; from curious to unconcerned, playful to nervous. Make sure both have plenty of space and the ability to retreat if necessary.
How do I know if my cat is psychotic?
Loud meowing and tormenting prey could be signs that your cat is a psychopath, according to top scientists.
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Tell-tale signs include:
- Tormenting their prey rather than killing it straight away.
- Vocalises loudly (e.g meows, yowls) for no apparent reason.
- Very excitable (e.g goes into 'overdrive' and becomes uncoordinated)
Why is my cat scared of my new cat?
They will likely regard the new cat as a stranger and not as a member of the family. This is normal. They don't hate the new cat — they are simply scared of him and need time to learn that the new cat is not a danger.
Why is my cat hissing at my other cat after a bath?
Non-recognition Aggression in Cats
It seems difficult to believe that a cat cannot recognize its companion just after a bath. This type of aggression is not entirely understood even by experts. The believe cause is the cat is disturbed or 'doesn't recognize' the other cat due to its smells or behavior.
Do cats only hiss when mad?
In time, your cat might venture out to learn more about this strange-smelling person. But cats don't just hiss at strangers. Sometimes your cat might even hiss at you, seemingly out of nowhere. Many things can prompt this, but it's usually because your cat is overstimulated and feeling insecure.
How long do cat introductions take?
The initial process should take at least two weeks and, assuming that you see no signs of aggression at the door (no hissing, growling, etc.), you can introduce the cats to each other. One method is to replace the door with a temporary screen door so that the cats can see each other.
Will two cats eventually get along?
It takes most cats eight to 12 months to develop a friendship with a new cat. Although some cats certainly become close friends, others never do. Many cats who don't become buddies learn to avoid each other, but some cats fight when introduced and continue to do so until one of the cats must be re-homed.
Should I get a kitten for my senior cat?
People frequently assume that getting a young exuberant kitten as a companion for an elderly cat will help perk up the senior's spirits. In reality, however, bringing home a kitten is likely to make the older cat's life more uncomfortable.
How do I know if my cat likes my new kitten?
How to tell if your cats get along with each other – six key behaviours to look for.
- They head-butt each other. Don't worry, not in an aggressive way! ...
- They groom each other. ...
- They snooze together. ...
- They touch noses. ...
- They hang out together. ...
- They have a rough and tumble.
How do I tell my cat no?
Simply say, "No" when it engages in a negative behavior. If your cat stops the behavior when you ask, reward it with treats, a toy, or praise. If your cat does not listen when you say "No," try adding a small clap as well.