Katrina C. Albers
Animal Caregiver • Cat Behaviorist • Artist
Introducing Cats To Other Pets
Introducing Cats to Cats
A carefully planned 2-week cat introduction is crucial. Most of the time, after a slow and appropriate introduction, cats will form a healthy bond. Cats may not always become the best of friends, but they can usually learn to coexist in harmony. Proper introductions of new cats to resident cats can prevent future conflicts and set the stage for years of friendship.
* Please note that a proper cat-to-cat introduction takes time! *
Keep the cats separated at first. A cat from a shelter should be physically isolated from your resident cats for 10-14 days, not only to ensure a proper introduction, but also to make sure they are not incubating a contagious illness. The isolation area chosen for your new cat should be a room with a door, so that there is no contact between the newcomer and resident cat. If space is limited, a large kennel cage with a blanket over it will suffice. Upon arrival, the new cat should be brought directly into the isolation room with food, water, toys, litter box and hiding box (cardboard box, cave-like bed, or cat carrier).
Make sure the original resident cat is being spoiled. You should start spoiling your resident cat(s) the moment the new cat enters the house! Do whatever makes your cat happy, and do it often. If your cat loves a certain food, now is the time to give them that food. If your cat has a favorite toy or game, keep them occupied and happy with that. Don’t worry that you’re not giving as much attention to the new cat right now. Now is the time to focus enrichment and love on the resident cat. This way, the resident cat will think, “This new cat entered my life and brought me so much happiness! I’m getting all of my favorite things! Maybe this new cat isn’t so scary! Maybe I like them.”
Begin your introduction by feeding them on opposite sides of a door. You can start doing this the second day. Allowing the cats to smell each other while they eat their favorite food will create positive associations for both cats.
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Place wet food bowls 6 feet from each side of the closed door where your new cat is isolated.
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If both cats eat, move the food closer each day. If one doesn't eat at some point, move the bowls further away. Eating or not eating at each distance from the door indicates the cats’ stress levels.
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Once both cats can eat with the bowls touching the door, move on to the next step.
Next try scent swapping. Cats live scent-based lives. Most of their memories, good or bad, are of smells. Cats need to get comfortable with each other’s scent before they meet. Place one blanket or towel in the new cat’s room, and another in your resident cat’s favorite spot. After they have spent time sleeping on these linens, swap them. This way, the cats can smell each other without the stress of a face-to-face introduction. If they don’t have certain blankets that they sleep on, try rubbing a clean towel on your resident cat and another on your new cat. After doing so, rub each cat with the opposite towel so they are covered in each other’s scent. The towels can then be left with each cat to continue the scent exchange. If they enjoy brushing, you should also brush the cats with the same brush to help create a “group scent.”
Then try a space switch. After 2 days of scent-swapping, allow the new cat to explore the other rooms of the house while allowing the resident to explore the new cat’s isolation area. This switch provides a way for the cats to experience each other’s scent without a face to face meeting, and allows the newcomer to become familiar with their surroundings. This should be done for an hour a day for 3 or 4 days.
Now it’s time for the cats to see each other. This next step allows the cats to glimpse each other through the door. Crack the door just enough for them to be able to see each other. Immediately close the door if either cat becomes fearful or threatening. Do not allow any physical encounters until the cats are fully relaxed while looking at each other. For additional safety, if needed, the visual introduction can be conducted with the new cat placed inside a cat carrier. Repeat until you can leave the door propped open with no problems.
Don’t worry if the cats hiss! Hissing simply translates to “I’m not feeling comfortable right now.” which is normal. Cats may hiss for weeks, or even months, as they become comfortable with this new situation. The hissing will eventually subside.
This whole process can take anywhere from two weeks to several months, so please be patient. If the cats are inflicting injury upon each other, the introduction process will need to be started again from the beginning. If cats no longer appear stressed and do not wish to cause physical harm to each other, the separation period may cease, and your hard work will be rewarded by nicely coexisting cats.
How to Help Cats Get Along
If you’ve followed all of the rules above and it’s still not going well, here are some additional tips. If you haven’t exactly followed the rules, it’s possible to start over and try again. Remember that when cats aren’t getting along, it is because they are afraid of each other. Cats do not have the ability to “hate” or be “mad.” The negative behaviors you see are all rooted in fear. The “meanest” cat is the one that is the most afraid. Please keep that in mind, and try to see things from their point of view. Help build their confidence by adhering to the rules of introduction and utilizing the following tips:
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Create fun activities every time the cats see each other. Never let the cats see each other with nothing to do. If a cat is scared of another cat, the worst thing you can do is let them stare at each other and think about how scared they are. Distraction is key! There should be a fun activity happening every time they see each other: wet food feeding, wand toy playtime, clicker training, whatever is pleasing to them.
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Use Feliway plug-in diffusers or spray to calm cats down and help with adjustment. They work!
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Play with both cats! Interactive wand toy playtime solves most cat behavior issues. Playtime helps them lose defensiveness and realize they can share space. It also tires out the bully. Remember, the reason they’re not getting along is because they’re scared of each other. Hunting-type playtime with a wand toy builds their confidence because it helps them to feel like predators, catching their prey. Cats are one of the only animals that are both predator and prey. When you see negative behavior from cats, it’s because they’re feeling like prey. Helping your cats to feel like confident predators will help your cats get along.
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Use a “sight blocker” (towel, blanket, piece of cardboard) when you see things starting to go badly. Cats stare each other in the eyes before attacking, it’s their way of challenging each other. So stop the staring before it escalates.
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Give them something to identify as their own - a big bed, a pod / cubby hideaway, a shelf up high. Cats without any item to call their own will act in undesirable ways. These items will give them more territory to own and therefore more territorial confidence.
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Feed them in a way so that nobody feels like they get less food or has to fight for their food. Not having to compete for food is vital. Many people think, “My cats get along when they eat, and can eat near each other without a problem.” But what people don’t realize is that cats are programmed to be hunters, and will do anything to ensure they get a meal. If you put the bowls of food next to each other, cats will eat together, but only because they think they may never get another meal. Make sure feeding time is not stressful, and feed in separate rooms until you know that the cats get along.
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Open up a vertical world so they have escape routes. Put up shelving that they can jump up on and get away. When a cat feels stress, they immediately go into “fight or flight mode,” and cats always choose “flight” first. But, if they feel there’s nowhere they can escape to away from the other cat, they will resort to “fight.”
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Make sure there are at least as many litter boxes as cats. This will ensure that there is no competition for resources. Also make sure that litter boxes aren’t “traps” where the other cat could ambush them. Make sure to use open (not covered) litter boxes, and place them in spots that provide more than one exit option.
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Add some scent-soakers to your home. Cats live scent-based lives, and their own scent brings them comfort. Get them each a cardboard scratcher, and let them scratch & claw and mark them with their scent. Put one of each cat’s scent-soakers at the entrance to a room to make it a neutral territory.
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Reward confident behavior. Don’t treat the victim-cat like a victim, or they will keep acting the part. Be a source of positivity, play, and food, and do not reward fear.
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Keep yourself calm and the cats will be calm. Cats feed off of our emotions. If you think the situation will turn out ok, the cats will sense it, and it will eventually be ok.
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And, most importantly, give it time. Don’t give up after 24 hours. While an easy cat-to-cat introduction takes 2 weeks, it could take up to 3-6 months! Very few cats are truly unable to live with another cat. Most of the time, things work themselves out over time, and cats begin to coexist and even become friends!
Introducing Cats to Dogs
Some dogs do fine living with cats; others simply cannot live safely with cats. Even if the dog has cat experience and the cat has lived with a dog before, proceed cautiously during the first introduction. It’s best to have two people present, one to intervene with each animal if necessary. If you have more than one dog, introduce each dog separately to the cat.
The dog should be held on a loose leash. One person should watch the dog’s body language and the other should watch the cat’s. If the cat is not acting aggressively (raising his back, hissing) toward the dog, they can be allowed to move around freely. A cat is rarely a threat to a dog, but there are some cats that will meet dogs aggressively. If the dog is not acting aggressively toward the cat, then you can ask the dog to sit, or lie down and stay, while the cat moves around freely, sniffing the dog if they wish. The dog should be praised and rewarded if they ignore the cat.
If the dog has a strong prey instinct, they will become very focused; they’ll stiffen and stare, and may start barking or whining. If you see these signs, do not allow the dog near the cat. Especially, do not allow the dog to chase the cat. If the dog lunges and tries to chase the cat, you should try a different strategy for getting them to share space.
Instead, put the cat in a bedroom with a tall baby gate across the door. Give the cat all needed supplies: litter box, food and water. Allow the dog to view the cat briefly through the gate, and then get the dog to focus on something else, like playing or practicing cues. Praise and reward the dog for being able to focus elsewhere. Continue to give the dog short viewings of the cat throughout the day.
The hope here is that the dog will eventually lose interest in the cat. In some cases, the dog will lose interest in the cat within a couple of hours, but some need days, and others simply will not be able to share a space safely with a cat. If you don’t feel you can trust your dog around your cat, you should keep them apart. Many dogs can injure or kill a cat very quickly, and dogs can also be injured by cats (eye injuries are not uncommon).
Now, about kittens and puppies: If you are introducing a kitten to more than one dog, again, introduce only one dog at a time. Small kittens may not have any fear of dogs, so you must watch the dog carefully. If your dog is young and high energy, he could hurt or kill the kitten simply by trying to play. Because kittens are small and want to run and play, dogs with a strong prey drive may be very excited by a kitten’s movements.
In fact, kittens and dogs should not be left alone at all. Even if your dog is OK with your adult cats, she may become too rough with a kitten and hurt him. So, for safety’s sake, keep small kittens and dogs apart any time you are not watching them.
Introducing puppies and adult cats can sometimes be easy, since a well-socialized adult cat will quickly stand up for themself and “tell” a puppy to respect their personal cat space. However, if your rambunctious puppy is chasing your shy cat, the cat may need your help to control the puppy. Until the puppy is old enough to have more self-control and has had some training, baby gates can be used to keep the animals safely and comfortably apart.
Animals with good past experience often adjust well and quickly. But, if introductions do not go well, seek professional help from a trainer. Don’t ever use punishment because it will not help and it could make matters much worse.