Warning signs when introducing cats

Warning signs when introducing cats? Because cats are highly territorial and solitary creatures, your feline companion may take offense if you introduce other cats into its territory. As a cat owner, it can be challenging to introduce a new cat to your resident cat. At first, the two cats may not get along, and it may take days or weeks for them to form a bond. When you get a new cat into your home, your resident cat may become defensive.

It may hiss, growl, or rumble in response to the newcomer and attempt to drive him away. Frequently, both cats will engage in fights that escalate into hostile and life-threatening situations. As a cat lover, you must be aware of the warning signs associated with cat introductions. You must be aware of those signs to avoid hostility and aggression between your feline partners. If your cats receive an appropriate introduction, they will quickly feel at ease and begin to get along.

How to significantly increase the chances of a successful introduction

Even if you adhere to the recommended steps for an effective introduction, there is no guarantee of success. Cats are unpredictable, and even those who have previously tolerated one another may fight. Apart from properly introducing your pets, there are a few tricks you can use to increase the likelihood of your cats getting along.

Adopt the right cat

Purchasing a second cat is a significant commitment that should not be taken lightly. Consider the gender, age, personality, and history before bringing it into your home. On the other hand, you should consider these factors when it comes to your resident cat. If you have two or more cats already who get along well, adding another cat can upset the balance.

Set up your home properly

Preparing your home is another critical task that you must complete before bringing a new cat home. In an ideal world, your new cat would have his own space. This designated space should include everything he requires, from a feeding station to a sleeping area.

Use of scent

Cats can communicate with people and other cats in various ways, one of which is through the use of scents. To ensure the success of your introductions, you must leverage the power of scents. When you pick up your new cat, bring an item that contains the scent of your resident cat, such as bedding. This will assist in initiating the introduction process even before your pets meet.

Once you return home, you should begin allowing your two cats to exchange scents by exchanging their bedding. This assists both animals in becoming acquainted with one another. 

How To Introduce Cats Fast?

You can do specified things to introduce your cats fast. If done correctly, it can assist your cat in adjusting in the shortest amount of time possible. Take care to follow the steps outlined below. 

  • Make a separate room for your new cat. A litter box, a comfortable bed, a scratching post, a few toys, the necessary cat food, and adequate drinking water must all be provided in the room. After a few days, you may switch your cat’s rooms. Hence, your resident cat and the new cat can hear and smell each other and grow curiosity. At this stage, avoid any direct interaction between your cats.
  • Now, gradually introduce the cats to one another while maintaining a safe distance. With the assistance of another family member, bring two cats together in one location, but keep them at least ten feet apart. When the cats meet, greet them with their names and give them food or toys. Then, segregate themselves in their respective rooms.
  • For the next few days, follow the pattern above and make both of them feel at ease by playing with them and feeding them when they are hungry. Then you’ll notice that they’re not hostile to one another and have begun to get along. Finally, allow them to share a room for one night. 

By following the simple three-step process outlined above, you can quickly introduce your cats to your household and allow them to form a strong bond.

Warning Signs When Introducing Cats

Warning signs when introducing cats? Cats are highly territorial and dislike when other cats intrude on their territory. They exhibit fear, defensiveness, and even aggression toward the intruders. That is why, when your already-owned cat notices that you have brought another cat into the same room, the resident cat becomes highly aware of it and expresses its discomfort in a variety of ways.

Occasionally, both cats will demonstrate aggression by hissing, snarling, fluffing their fur, and even attacking and biting one another. To avoid any hostile situations when introducing your cats, you must be aware of all warning signs. It will assist you in determining whether they are getting along or fighting and injuring one another. 


When you introduce a new cat into a household with an existing cat, one or both cats may immediately begin hissing. This sound is comparable to a snake hissing or the sound of air being released from a car tire. Your cats may hiss in response to their fear, disgust, or discomfort at being nearby. Additionally, hissing serves as a warning to other cats. If any of your cats hiss when introduced to another, this is a warning sign that your feline companions are nervous about the experience.


Cats can start rumbling when introduced to each other. The rumbling sound is a warning signal from one cat to the other. Typically, cats make this sound when they are angry or fearful of losing their territory. Suppose your resident cat rumbles upon seeing the newcomer. In that case, this indicates that your resident cat is not welcoming the newcomer and is attempting to scare it away through the display of aggression. 


When your cats are introduced, they may growl as a warning sign. Growling, like rumbling, is a warning sound that indicates unhappiness, aggression, or fear. It is, without a doubt, a distinctive sound! It’s natural for your resident cat to growl when your new cat approaches. Typically, the dominant cat growls, indicating that it wishes to evict the other cat from its territory. 

Cats Start Snarling 

When a new cat is introduced to your resident cat, it may begin snarling. While snarling is similar to growling, it is significantly louder and higher pitched. Your already-owned feline companion snarls in response to the newcomer’s introduction. Snarling is often accompanied by hissing as a warning sign that your resident cat is uneasy in the presence of the newcomer.

Cats Flattening Their Ears

When first introduced to a new cat, your cat may flatten its ears in response. When cats become anxious, nervous, or threatened, they may flatten their ears and press them back and down.

Additionally, it may indicate that your cat is enraged at the prospect of meeting the other cat. As a cat owner, you must keep your cats apart if they flatten their ears and display aggression.

Cats Puffing Up Their Fur

When introduced to a new cat, your resident cat’s body and tail may puff up. Generally, cats puff up their fur as a form of defense. They attempt to appear larger and dominate the other cats by puffing up their bodies. While introducing the other cat, the insecure or less dominant cat may do this to scare it away. 

Cats’ Pupils Are Dilated 

You may notice your cats’ pupils dilate during their initial encounter. This demonstrates their enthusiasm for the situation. They show fear or depression by dilation of their pupils. If the cats develop anxiety due to the introduction, they can express their distress in this manner. This is a red flag that your feline companions are not yet ready to get along. 

Cats Are Staring At Each Other 

When two cats meet, they may stare at one another for a while. If your resident cat maintains an extended gaze on the newcomer, this indicates that the cat is gradually developing aggression. Eventually, your resident cat will attack the new cat, ejecting it from its territory. To avoid conflict in this situation, you must separate them and lock them in separate rooms. 

Cats May Start Attacking and Biting 

Your cats may become excessively aggressive and attempt to bite one another during their initial encounter. Cats are highly individualistic animals, and as such, they dislike intruders in their territory. When your cats first meet, they may become aggressive and attempt to bite each other. This cautionary sign indicates that it may take additional time and your deliberate intervention for your cats to get along.

Cats Are Hiding from Each Other

Cats frequently hide from one another during their introduction. Typically, the dominant cat approaches, while the less prevalent cat cowers in fear. Your less dominant cat attempts to hide beneath the bed or sofa to avoid direct contact with the stronger one.

Cats May Stop Eating 

When you introduce a new cat into the territory of an already owned cat and feed them in the same room, the resident cat will naturally become fearful of the newcomer and stop eating. Additionally, if you introduce the new cat too quickly, your resident cat may feel threatened and uneasy. 

Resident Cat Is Not Using the Litterbox

When you introduce a new cat into the same room as an existing cat, the resident cat may cease to use the litterbox. It occurs when the cats do not get along and feel fearful or threatened in the presence of one another. This indicates that both cats require additional time and proper introduction to get along.

The New Cat May Not Have Enough Exploration Time 

If your new cat does not have adequate exploration time in your home and is quickly introduced to your resident cat, the experience can be intimidating for the newcomer. In this case, the new cat might feel uneasy in the new environment. Additionally, if the resident cat asserts dominance over the newcomer, the situation can spiral uncontrollably. 

Cats May Not Get a Proper Introduction

When your cats do not have an appropriate introduction, they may act aggressively and become hostile from the first encounter. They can growl and hiss at one another and even engage in combat to demonstrate dominance. This is a warning sign that your cats are becoming intolerant of one another and expressing their dislike for one another. 

Cats Are Refusing to Coexist Together

Despite your best efforts, your cats may occasionally refuse to coexist. They may develop an aversion to each other’s presence and grow increasingly hostile over time. They may demonstrate a reluctance to eat, play, or cooperate.

This indicates that your cats require a break. It would be beneficial if you separated them and then reintroduced them properly after a few days. Ensure that everything is in order; you can seek assistance from your veterinarian or an animal behaviorist.

What Is Normal When Introducing Cats

When you introduce a new cat to an existing cat, there is a good chance that your resident cat will dislike the initial encounter. It may demonstrate aggression toward the visitor by hissing, growling, snarling, or even attacking. Warning signs when introducing cats?

Because cats are highly territorial and solitary animals, it’s natural for your resident cat to exhibit intolerance initially. However, if introduced properly, they may gradually become acquainted and begin eating, playing, and thus coexisting in your home.

Is Hissing Between Cats Normal?

When cats first meet, it is natural for them to hiss. This is a natural reaction for both cats – the resident and the new one. This indicates that both cats are excited and concerned about this new development and fearful and defensive.

They can also demonstrate their dominance and anger by hissing. However, with proper introduction, the cats may begin to get along within a few days or weeks.

How Long Would It Take for Cats to Become Used To Each Other?

Certain cats may take only a few days or weeks to adjust, while others may take several months. There is no set timetable for cats to coexist. Particular cats quickly form bonds with others, while others take a long time to develop friendships. Warning signs when introducing cats?

Following the initial introduction, it may take up to eight to twelve months for some cats to develop a friendly relationship. Each cat has an individual personality that is unmatched by others. That is why the bonding period varies between cats.

How Would I Know If My Cats Like One Another?

Numerous signs indicate that your cats get along, but the most likely is that they are rubbing their bodies and faces together. Additionally, the bonded cats stand alongside one another and intertwine their tails.

Additionally, they cuddle and sleep on one another’s laps. They will, however, play and enjoy their time together. They will also groom and care for one another. While cats are typically solitary hunters, they may get along with and socialize with the cats they adore.

What Happens If Cats Are Introduced Too Soon?

If you introduce cats too soon, they are likely to feel threatened and become aggressive. Cats have a difficult time getting along if introduced too quickly. They frequently develop an instinct for aggression from the start.

The dominant cat may hiss, growl, or snarl at the other cats or attempt to drive them away. It is always preferable to allow them sufficient time to get to know one another and gradually settle down. As a cat owner, you should take your time when it comes to introducing your cats.

When One Cat Is Aggressive, How To Introduce Two Cats?

When you have an aggressive cat, you should not release it in front of the other. The best action is to segregate it in a separate room equipped with a litter tray, scratching post, food, and adequate water.

Then gradually allow the aggressive cat to explore and expand its territory within your home. Then it would help if you swapped it with the resident cat’s room. As a result, both cats will become accustomed to each other’s scent and smell. After a few days, introduce them gradually, separating them by the door. Warning signs when introducing cats?

Allow them adequate time and attempt to interact with them and feed them together. This way, the aggressive cat will gradually learn to coexist with the other. The less dominant individual will also feel secure and at ease. If nothing else works and the aggressive cat continues to demonstrate dominance and anger, you should seek additional assistance from an animal behaviorist or veterinarian.

What Are Some Things You Should Avoid When Introducing a Cat?

When introducing cats, there are a few things you should avoid. Avoid introducing the cats too soon. When you take a new cat to your home, ensure that it has its room.

Warning signs when introducing cats? Additionally, it would help if you refrained from free-feeding the cats. Both cats must eat in their assigned rooms. Allow them no contact or eye contact during the first few days. Slowly and steadily introduce yourself. Otherwise, the cats will become aggressive or fearful of one another.

Signs Cats Are Starting to Get Along

There are five common indications that your cats are becoming friends. They will spend most of their time together and lick each other’s bodies. Additionally, they will interact with one another, cuddle, and sleep on one another’s laps. They will, however, begin using the same litter box and eating from the same bowl peacefully.

Most of the Time, Your Cats Will Remain Together

When your cats become friends, they tend to stick together for the most part. Additionally, they stand next to one another and occasionally entwine their tails. This is a sign that both cats are content and happy to be in this companionship. 

Your Cats Will Lick Each Other

If your cats begin to lick each other’s bodies and faces, you can be certain they are becoming friends. They spread their scent to others through licking. It’s an unmistakable sign of cooperation.

They Will Play Together

When your feline companions get along, they will play together. They may gently bite each other, engage in some chasing, and even hiss gently. All of this is a part of their performance. It’s a sign that they’re having a good time together and enjoying each other’s company.

They’re Going to Cuddle and Sleep On Each Other’s Laps

Cuddling and sleeping on each other’s laps are clear indicators that your cats are developing a positive relationship. They do so when they perceive themselves to be safe and secure in the relationship. Additionally, it is endearing when your feline companions sleep on each other’s laps. 

Your Cats Will Utilize a Common Litter Box

When your cat begins to use the same litter box, you should be relieved that they are becoming acquainted. Due to cats’ high sensitivity to smell and individualism, they rarely allow other cats to poop in their litter box. However, when they permit it, it indicates that the cats are getting along well.

Things To Consider

There are minor additional points to consider when introducing cats. You must exercise extreme patience and pay close attention to their behavior. It would help if you first comprehended their personality and then make the right move when they meet for the first time. 

Never Introduce an Unvaccinated Cat

Avoid introducing an unvaccinated new cat into your household. Before releasing the new cat into your home, ensure that it has been vaccinated and is free of fleas, mites, and other parasites. 

Don’t Introduce a New Cat Immediately to Your Resident Cat

Avoid immediately introducing the new cat to your resident cat. Being hasty may prove to be fatal. In case you do so, your resident cat will perceive a threat and exhibit aggressive behavior in an attempt to drive the new cat away. Therefore, keep the new cat in a separate room for a few days before gradually introducing it to your existing cat. 

Never Let Your Cats Fight

When introducing cats, always keep an eye on them. If any of the cats become aggressive or attempts to fight with the other cat, you must immediately separate them. Never allow them to fight, as it may prove highly hostile and life-threatening for them.

Introduce Your New Cat to The Most Dominant Cat First

In a multi-cat household, the new cat should be introduced gradually to the dominant or alpha cat first. When the dominant cat accepts the newcomer, tensions subside, and the other cats readily accept the newcomer as well. However, never be in a hurry while doing so. Always introduce by following the proper procedure and allotting sufficient time. 

Never Force an Introduction

Never forcefully introduce the cats. Never believe that simply putting them in the same room will cause them to socialize. This is extremely rare in reality. As a result, the cats require a proper and systematic introduction. Otherwise, they will refuse to coexist and constantly fight and be aggressive, making your life a living hell. See also Do cats remember people?