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Cats and Fighting | How to Stop Cats Fighting

Cats Fighting

It can be incredibly upsetting to witness your cat getting into a fight, whether it's with their companions at home or other cats outside.

There are great ways to stop cats fighting, both in the short term and long term. In this article we will look into why do cats fight?, why do cats fight each other? and how to stop cat fights immediately, and explore long term strategies for preventing future fights. Whether it’s play fighting between house cats or outdoor cats fighting over territory, we will help you understand what causes tension in multi cat households, how to separate cats safely, and what to do if a female cat or neutered cat becomes aggressive. We’ll also discuss how a litter box, playtime, and other factors in a cat’s home can help prevent cats fighting.

Two Cats fighting each other outside.

Why do cats fight?

The reasons behind a cat fight can vary, but in the scenario described, it's likely due to the cats not recognizing each other. This may seem strange to us, but scent plays a major role in how cats know one another. If a cat returns from the vet smelling or behaving differently, the other house cat might perceive them as unfamiliar, causing tension.


Cats are highly territorial, and an unfamiliar cat cat is often met with suspicion and hostility. One cat, feeling a threat in their territory, naturally moves to defend itself. Meanwhile, the returning cat, who may have recognized their companion, now feels fearful and tries to run away. This defensive behavior can escalate into a cat fight, even though they previously engaged in play fighting.


Sometimes, cats may have never gotten along in the first place, possibly due to personality clashes, a negative interaction, or being introduced incorrectly. This can cause long-term tension in multi-cat households, especially if aggressive cats are involved. A poorly executed introduction can lead to each fight reinforcing their fear of one another.


In other cases, a cat fight can result from a misinterpreted frightening event. For instance, if you drop a pan near one cat, the noise might scare them. If they see or are near another cat, they may mistakenly believe the other cat caused their fear, or cat try to alleviate anxiety by attacking. Female cats and neutered cats can still exhibit this type of territorial behavior, causing more cat territorial disputes.


To help cats in such situations, it may be necessary to separate cats temporarily and reintroduce them slowly, especially after a stressful event. Reducing tension by providing separate feeding areas, litter boxes, and giving each cat their own space to prevent conflict can stop the likely fight and help restore peace in a multi-cat household. If you notice cats hiss, growl, or frequently engage in aggressive behavior, addressing these issues early on can stop them from escalating into frequent cat fights.

Two cats facing off in an aggressive way.

Cats Fighting Behavior

First, it's essential to understand that cats, especially neutered cats and spayed female cats, typically avoid actual cats fighting. Their behavior is designed to prevent physical confrontations that could result in injury, and cats fighting is generally a last resort in any multi-cat situation.


Look for these behaviors to help cats and prevent cats fighting:


  • Vocalization: During cats fighting, you'll hear them hiss, growl, and yowl. This vocalization is a clear sign of escalating tension.
  • Mouth: When cats fighting engage, they may bite each other, pulling out fur and leaving fang marks. Skin may even be broken, showing evidence of a negative interaction.
  • Claws: Cats use their claws in fights, leading to scratches on the face or body. Even in play fighting, sometimes a play cat may accidentally scratch another if their nails aren’t trimmed regularly. How to trim cat claws.
  • Fur: Cats may puff up or flatten their fur when engaging in a cat fight, depending on the level of fear or aggression.
  • Body Posture: In a cat territorial dispute, cats fighting will arch their backs to appear larger or flatten to the ground to seem smaller. A house cat in defense mode might lean back or lie on its side to scratch or bite if necessary. In play fighting, cats often lean forward or switch positions.
  • Ears: During a likely fight, cats will pull their ears back to protect them since ears are vulnerable.
  • Eyes: Fearful or aggressive cats will have dilated pupils, preparing for conflict or escape.
  • Whiskers: A frightened cat will pull its whiskers tight to its face, while an offensively aggressive cat will push its whiskers forward.
  • Body Position: In cats fighting, one cat will try to dominate the other by taking a position on top, while the submissive cat will run away or retreat. During play, cats know to take turns.
  • Tail: An agitated or aggressive cat will thump its tail, signaling distress during a tense moment.
  • Activity: An aggressor cat will continue chasing the runaway or submissive cat, trying to assert dominance. The submissive cat runs or hides in fear.
  • Timing: Fighting is continuous and without breaks, while play fighting allows for pauses and turns.
  • Scratching Objects: Unlike in play, cats fighting will not stop to scratch furniture or objects, as their focus is on the confrontation.

In multi-cat households, it’s important to stop cat fights early by monitoring these signs. You may need to separate cats and create calming environments to prevent serious cats fighting. Properly introducing cats, providing separate litter boxes, and reducing cat territorial disputes can significantly lower the chances of a likely fight.

Aggressive cat showing teeth.

How to reduce cat stress when cats fight

Most cats prefer a solo lifestyle, than living in groups due to their independent nature and preference for personal space and tranquility. There are ways to make living in a multi cat household less stressful for them by offering feeding stations and multiple water stations and creating quiet hiding spots, for relaxation and peace of mind. Also you can try using cat pheromones sprays or plug in diffusers to help them feel calmer and control behaviors. Having a new cat join your home or managing cats fighting may require using these tactics.

Are my cats fighting or playing?

How to know if cats are playing or fighting? It can be tricky to tell whether cats are playing or fighting, as many behaviors look similar. During play, cats chasing each other around the house is normal, especially for bonded cats who enjoy play-fighting. The key difference is in their body language. If there’s no hissing, growling, or puffed-up fur, and the cats take turns being the "hunter" and "prey," they are likely playing. However, if you notice stiff postures, raised hackles, or vocal aggression, then it’s probably more serious, and you should intervene.


If you’re wondering, "how do you know if cats are playing or fighting?" or "are my cats fighting or playing?", watch for mutual engagement and breaks in the action, which signal play. But if you see intense swiping or biting, it may be time to step in. Observing these behaviors will help you figure out whether your cats are fighting or playing. If you’re still unsure, you might ask yourself, how do I know if my cats are playing or fighting? Pay attention to the overall mood—playful cats will usually return to calm behavior after their chase.


To distinguish between playful behavior and a real fight, observe your cat's body language closely. If a cat feels threatened or irritated, signs like flattened ears and a swishing tail may appear.

When cats are playing, you’ll typically notice:


  • Silence: Play fighting is usually quiet, with frequent pauses as they reposition or prepare to chase each other.
  • Gentleness: While biting may occur, it's gentle, and claws are usually retracted to avoid injury.
  • Reciprocity: The roles of chaser and chased will frequently switch between the cats.
  • Calm Afterward: After playing, the cats will typically relax and return to normal without signs of tension or aggression.

Tension in a multi cat household.

Cats living together

Cats enjoy having their space and typically do not require a companion to feel contented. They can coexist peacefully with felines long as they perceive themselves as part of a shared social circle. Additionally it is beneficial if they do not sense any need to compete for resources, like food, water and cosy cat beds.


Happy cats who are companions often show affection by grooming each other and rubbing against one another while sleeping in contact, with each other as well. If you observe these behaviors between your cats it indicates they are part of a knit circle.


Even if cats appear to get along with each other there could be hidden tension that owners might not easily notice. Cats are animals; having multiple cats, in a household could potentially lead to stress when it comes to sharing their territory.


The ongoing conflict, between cats may result in health problems like cystitis or excessive grooming and behavioral issues such as elimination in the home environment. It's essential to consider how well your cats get along beyond observing if they fight since many cats can experience stress without active conflicts, in a shared living space.

Here’s what to look for if you think your cats are fighting:

If your cats fighting and you see them standing on their hind legs, rapidly swiping at each other with their front paws, it’s likely an aggressive encounter. Other signs to watch for include aggressive body language or sounds, such as flattened ears, rigid posture, a swishing tail, and vocalizations like growling, hissing, or screeching.


These are all common indicators that a serious fight is taking place. When a cat fight breaks out, it's important to separate them safely to avoid injury. Never use your hands during a tense moment, as you could get hurt. Instead, try using a distraction, such as a cat toy or a loud noise, to break up the fight. Cats often instinctively respond to these cues, giving them a moment to cool off. After a fight or during times of high energy, like running or play, it’s best to give your cat some space to relax before handling them again. Allowing them to calm down reduces the risk of reigniting any tension.

Cats fighting on a fence.

Why are my cats fighting suddenly when they’ve always got along before?

Cats generally prefer to avoid conflict, with fighting being a last resort. However, several factors can cause previously content cats to start fighting. One common reason is time spent away from home. Cats in the same social group share a communal scent that helps them recognize one another. If a cat returns home smelling unfamiliar after being outside, the other cat may perceive them as a stranger. Redirected aggression is another cause of feline conflict. When a cat becomes frustrated or stressed, perhaps by seeing an unfamiliar cat through a window, hearing fireworks, or being startled by loud noises—they may direct their aggression toward the other cat. Changes in the home environment can also trigger fights, as cats thrive on routine. The introduction of new furniture or the presence of visitors can make them feel threatened or unsettled.


Indoor cats can have an especially hard time because they lack the space to escape each other. To prevent this, ensure there are enough resources—such as food, water, and litter boxes—to go around. It’s also important to provide plenty of hiding spots where they can retreat and feel secure, allowing them to cool off and regain their sense of safety.

Do female cats fight with male cats?

Male cats can sometimes dominate female cats, as they tend to be more aggressive, which can lead to cat fighting. They might express their aggression by picking cat fights with both male and female littermates, or even other cats in the household. However, male and female cats from different litters can live together peacefully, as long as they are given time to adjust and avoid potential cat fights during the initial introduction period.

Brother and sister cats fighting – what to do

While humans often maintain strong family bonds, this isn’t always the case for cats. Just because cats are from the same litter doesn’t mean they’ll remain close friends throughout their lives. It's not unusual for brother and sister cats to fight, especially as they reach social maturity around 18 months, even if they were once closely bonded. Rough play between siblings is also normal, as kittens and young cats typically engage in vigorous play. If you’re concerned that the play is too aggressive, try increasing human-directed play and using feeding stations and cat toys to give them another outlet for their energy.

two cats fighting in a living room.

How can I prevent fighting with a new cat in my household?

Introducing a new cat into your home can be both exciting and stressful, especially if you already have a resident cat. Your cat may view the new arrival as a threat to their territory, which can create tension between cats. Many owners bring their cats to shelters due to cats fighting at home, so it's essential to handle the introduction carefully.


First impressions are important, and by taking the process slowly, you can reduce the chances of cats fighting. Start by setting up a sanctuary for the new cat in a separate room, ensuring there’s no direct contact. This allows your cats to adjust to the presence of one another without immediately engaging in a play cat or cat fight. Swap scents by wiping their cheeks and foreheads with a cloth, then exchange these between their rooms to help them become familiar with each other's smell.


You can also ease the tension between cats by using a pheromone diffuser like Feliway, which creates a calming environment. After a few days, introduce them through a barrier, such as a glass door or baby gate, so they can see but not touch each other. When you notice your cats are comfortable observing each other without aggression, reward them for their positive behavior to reinforce the idea that calm interactions are good.


Eventually, once they appear relaxed and the tension between cats has lessened, let them meet face to face in a controlled environment. Ensure they have the space to run and hide if necessary. If cats fighting does occur, separate them immediately and slow down the process. By being patient and attentive, you can help prevent cats fighting and encourage peaceful coexistence.

How to stop cats fighting with neighbours cat?

To stop your cat from fighting with a neighbor's cat, start by identifying the triggers for the aggression. Cats are territorial by nature, so much of the fighting may stem from defending their space. One way to reduce this is by keeping your cat indoors, especially during peak hours when other cats are likely to roam. You can also try to block access to areas where the neighbor's cat enters your yard, such as using motion-activated sprinklers or barriers to deter them.


If your cat insists on going outside, consider supervised outdoor time or using a cat harness for controlled walks. You can also create a more enriched indoor environment with cat toys, scratching posts, and climbing areas to reduce frustration. In cases of redirected aggression, where your cat becomes aggressive after seeing another cat through a window, you can cover or block the windows to reduce visual stimuli.


If you know the owner of the neighbor’s cat, discussing the situation with them can also help find a mutually agreeable solution. Finally, if the problem persists, seeking advice from a veterinarian or animal behaviorist may provide additional strategies to manage the aggression and prevent future fights.

Cats fighting.

How to stop your cat fighting outside

Cats fighting outdoors can be a serious concern, as these encounters increase the risk of injury. To help keep your cat safe, it’s important to protect them from potential danger. Here are a few ways to prevent outdoor cat fights:


  • Neuter your cat: Unneutered male cats are more prone to aggression and tend to roam farther from home, which increases the chances of fighting. Neutering your cat can reduce these risks and help keep them safe.
  • Establish a routine: If possible, control the times your cat goes outside to avoid encounters with other cats. You can also talk to your neighbor about “timesharing,” where you coordinate your cat’s outdoor time with theirs to reduce the likelihood of conflict.
  • Keep them indoors at night: It’s safer to keep your cat inside after dark, as they are more likely to encounter other cats or get involved in road accidents at night.
  • Supervise outdoor time: If you hear your cat in distress outside, go check on them. Most strange cats will flee when they see a human, which can help stop a fight before it escalates.

Why are my bonded cats fighting?

Bonded cats can start cat fighting for several reasons, even if they’ve previously gotten along well. A common cause of bonded cats suddenly fighting is redirected aggression, where one cat becomes stressed or frustrated by something unrelated, like seeing another animal through the window or hearing a loud noise, and then lashes out at their companion. Environmental changes, such as new furniture, visitors, or a disruption in routine, can also trigger stress and lead to cats suddenly fighting or even a full-blown cat fight. Additionally, as cats mature, typically around 1 to 2 years old, their behavior may change, leading to territorial disputes and more cat fighting. Health issues or pain can also cause sudden aggression, so it's always wise to consult a vet if the fighting continues. By identifying the source of tension and giving both cats time to cool off, you can help restore harmony.

Bonded cats feeling aggressive.

FAQ

Is it normal for cats to fight each other?

Yes, it's normal for two cats to fight occasionally, especially when they are establishing territory or asserting dominance. Cats fighting each other can also result from stress, redirected aggression, or changes in their environment, such as the introduction of a new pet or rearranging furniture. Sometimes, what looks like a serious conflict may just be 2 cats fighting in a playful way, with chasing, pouncing, and swiping. However, if the cats keep fighting frequently or display aggressive behaviors like hissing, growling, or puffed-up fur, it might indicate a deeper issue.


If you're concerned that my cats are fighting too much, observe their behavior closely. Occasional squabbles are normal, but if the fighting becomes constant or overly intense, it may be necessary to intervene or address any underlying stress factors.

Should I stop my cats if they are fighting?

Yes, it’s important to intervene if your cats are fighting, especially if the situation escalates into serious aggression. If you're wondering, how can I stop my cats from fighting, it's essential to first observe the behavior. Signs like hissing, growling, or puffed-up fur indicate a need for intervention.


To figure out how to stop my cats from fighting, try distracting them with a loud noise or a toy instead of using your hands, as this can prevent injury. After they’ve calmed down, give them space to cool off before reintroducing them. For those asking how to stop cats fighting regularly, try identifying triggers such as environmental changes, territorial disputes, or stress. If you're dealing with nighttime issues and wondering how to stop cats from fighting at night, keeping them indoors, providing separate cat beds, and giving them plenty of enrichment during the day can help reduce tensions.


If you're still unsure how to stop my cats fighting, it might be helpful to consult a vet or behaviorist, especially if the fights continue frequently.

Why are my female cats fighting all of a sudden?

If you're wondering, "why are my cats fighting all of a sudden," there are several possible reasons for this sudden change in behavior. Female cats fighting can be triggered by environmental stress, such as changes in their routine, new furniture, or the introduction of visitors or other pets. Territorial disputes are common, especially if one cat feels her space or resources are threatened.


Another reason for sudden aggression is redirected frustration. This occurs when one cat becomes agitated or frightened by something external, such as an unfamiliar animal outside or a loud noise, and redirects that aggression toward the other cat. Health issues, such as pain or discomfort, may also cause sudden aggression between previously peaceful cats, so it's important to consult a vet if the fighting persists.


To stop cats from fighting, try to identify and eliminate any potential triggers. Providing each cat with their own space, resources, and safe retreat areas can help ease tension. If you're struggling to stop cats fighting, reintroducing them gradually and ensuring plenty of playtime to release pent-up energy may also help restore peace.

Why are my cats fighting at night?

If your cats are fighting outside at night, there are several possible reasons for this behavior. Cats are naturally more active during dawn and dusk, which often leads to increased territorial disputes. When you hear the familiar cats fighting noise outside, it likely signals a struggle over territory or resources, especially if outdoor space is limited. If my cats keep fighting outside, it could also be due to stress or agitation caused by external factors, such as other animals or unfamiliar sounds.


To address this, learning how to stop cats from fighting outside is crucial. Start by keeping your cats indoors at night, where they feel safer and are less likely to engage in territorial battles. If the cats fighting outside my house are not your pets, the meaning behind their fights often involves defending their territory from other roaming cats. You can try to deter other cats by using motion-activated sprinklers or barriers around your property.


For those looking for solutions on how to stop cats fighting outside, creating a more enriched environment indoors, with toys and playtime, will help reduce their urge to roam and fight. Additionally, make sure your cats are neutered or spayed, as this significantly reduces aggressive behavior.

Should I just let my two new cats fight it out?

No, you should not let your two new cats fighting "fight it out." Allowing a cat fight to escalate can result in injuries, stress, and long-term aggression between them. Cats are territorial creatures, and letting them resolve their disputes through fighting can damage their chances of peacefully coexisting.


To prevent cats fighting, introduce them gradually. Start by keeping them separated so they can adjust to each other’s presence by scent. Swap bedding or use a cloth to share their scents before allowing visual contact. Introduce them through a barrier, like a baby gate, so they can see each other without the risk of a cat fight. Gradually increase their interaction while rewarding calm behavior and positive interactions.


If your cats keep fighting despite these steps, reintroduce them more slowly, and consider using calming aids like pheromone diffusers. Letting them continue to fight without intervention could lead to persistent territorial issues and make it harder for them to form a bond.


Kelly Rushton with her cat Eddie Stafford.

Kelly Rushton

Meet Kelly Rushton, a dedicated cat enthusiast and proud owner of Feline Fancy Ltd. With a heart as big as her household, Kelly is the loving mum to 10 charming Ragdoll cats. In her world, felines reign supreme, and she brings professionalism and warmth to everything she does. Through her blog, Kelly shares her wealth of knowledge and experiences, offering insights into cat care, behavior, and the joy of living alongside these majestic creatures.


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