Guide: How to Introduce Your New Puppy to Your Cats

Cartoons and pop culture have instilled this image of cats and dogs as natural enemies, but the truth is, they can get along just fine.

The idea that they're natural enemies has a foundation in reality, though, so it's something you need to know and account for when you're introducing the two.

If you have a household with established cats, and you want to bring a new puppy into the fold, you need to do so very carefully. If your cats get the wrong first impression, it can set the tone for their whole relationship, and the last thing you want is antagonism between your beloved furry children.

So, let's talk about what you need to do to successfully introduce a new puppy to your cats!

Why Cats and Dogs Don't Get Along

Cartoons may have you believe that cats and dogs do nothing but fight, but there are also plenty of adorable photos showing the exact opposite, and that copacetic relationship is what you really want.

But why is it that cats and dogs so often don't get along? Well, it comes down almost entirely to behaviors.

The dog prey drive.

For example, dogs have an engrained prey drive instinct. This is the same instinct that compels dogs to play fetch, chase squirrels, and – in the case of herding breeds – round up livestock or even people.

So, when they see something smaller than them, like a cat, they're likely to try to chase it around. For a cat, of course, that's incredibly stressful and terrifying; they feel like they're being, well, chased and hunted.

Even if the dog doesn't do anything to them but say hi, lick, or play when they catch them, the cat is likely going to be very stressed about the whole process.

Dogs are also usually larger than cats, so it's a lot easier for the cat to feel threatened by them, even if the adorable doggo is just a huge puppy.

Body language of cats and dogs.

There are also fundamental differences in body language. In a dog, wagging a tail is a sign of happiness; for a cat, a swishing tail is a sign of agitation and irritation. So, a dog seeing a cat's tail swishing around might interpret it as a time to play and be social, while the cat just wants to be left alone.

Eye contact is also a big one. Cats lock eyes and stare when they're afraid or hunting; dogs lock eyes and watch when they're having a good time. Cats that are comfortable and happy tend to do long blinks and look away; dogs don't.

When you're bringing a dog into an established cat household, it's also important to realize that this feels like an intrusion on their territory.

Cats are pretty territorial and like to lay claim to their areas, and when a dog is added to the mix, it's another animal – another predator – taking over some of their space.

Depending on how defensive your cats are, this can be a huge source of stress and defensiveness.

How to Introduce a Puppy to Established Cats

If you want to bring a new puppy into a household with established cats, you need to go about things the right way.

Otherwise, you're going to have a lifetime of stress, fighting, and vigilance to make sure they don't hurt one another. Fortunately, this isn't uncommon, and introducing the dog as a puppy is the best option.

It's even better if you can have the cats socialized with dogs when they're kittens, but that's not always possible.

So, how do you go about the process?

Laying the groundwork for cats and dogs to coexist.

The first thing you need to do is make sure your cats have a lot of freedom they can use to escape the dog. Cats, when they're stressed and have had enough, prefer to retreat and hide to chill.

If they don't have a place they can go to relax and feel safe, they'll get more and more stressed until they lash out.

First, make sure there's a room where your cats can access, but your puppy isn't allowed. This might be a bathroom, a bedroom, or even a closet, but it needs to be a hiding place the dog can't get into so the cats can feel safe there.

Make sure they have the essentials in that room, including a litter box, food and water, toys, and a scratching post. This ideally won't be a permanent arrangement, but you definitely need it as long as your animals aren't comfortable with each other yet.

It might also be a good idea to set up some high perches and shelves where your cat can retreat to and your puppy can't.

Cats also like high places, and they can provide a bit of sanctuary from a rambunctious and energetic puppy, as well as a place your cat can go to watch this new creature without having to fully hide.

And, of course, remember that you're going to have to supervise every interaction between your new puppy and your cats for at least the next few weeks, if not months, until you're sure they're on good terms with each other.

Start with a barrier.

Just like when you're introducing two cats to each other, introducing a puppy to cats means you're going to need to keep them separate. You can't just bring a new puppy into the house, let them run wild, and expect things to work out.

Generally, you will want to designate one room or space for your puppy to be their sanctuary room, just like your cats have one. This is where your puppy will be confined outside of times when you take them on walks, to the vet, and for puppy training.

This will likely last for at least 3-4 days, and more likely for a week, depending on how the animals react to knowing each other is there.

To help foster some faint interactions, feed them on opposite sides of the same door, where they can smell and hear each other but not interact with each other. This helps them get used to the presence of the other animal in small doses.

Train your puppy early.

Speaking of puppy training, you definitely want to be working on the basic commands ASAP. In particular, you need them to be able to obey commands like "sit," "stay," "come," and "leave it" so that you can control them when they're interacting with your cats.

If you notice your puppy is harassing your cats and your cats aren't enjoying it, you need to be able to separate them, and a command is the easiest way to do so.

Start face to face meetings.

Once your critters are more comfortable with one another on the other side of a door, you can start to let them meet face-to-face.

It's best to avoid using either one of their sanctuary rooms for this, though some people prefer to set up something like a baby gate to keep the dog in theirs while the cats can see them.

Another option is to put your puppy in a harness and on their leash, and hold them by you while you allow the cats to roam as they want.

They'll likely be skeptical and skittish, but when they realize the dog can't chase them down or go after them, they'll feel a bit better exploring and watching from a distance.

For your part, this is where you really want to have managed some level of obedience training. If you can keep your pupper calm at your side, despite their instincts to go say hi to the new friends, it helps keep the cats calmer and friendlier.

Generally, you want to keep these meetings pretty short. It also helps if you have a friend or family member who can help supervise the cats, as well.

Finally, you want to have treats for both creatures on hand. Treats will help keep your puppy calmer and distracted from staring at the cats, and treats for the cats can help teach them that they're safe to eat and enjoy space and time despite the puppy being there.

If either side exhibits aggression, make sure to redirect that aggression, usually with a treat or a toy. It's all part of animal training, using positive reinforcement to distract away from problematic behaviors and reinforce better behaviors.

Progress to more unfettered social time.

Once your cats and your dog are more comfortable with each other's presence in the same room, you can start letting your puppy off their leash and allowing the two to interact.

You want the leash still attached, so you can stop them if a problem occurs, but ideally that won't happen.

If all goes well, you can continue to perform these meetings for longer and longer amounts of time until there's no need to keep supervising them.

If there's a squabble or a problem, you'll need to dial back and spend a bit more time on socialization.

It's still a good idea to keep the fuzzy babies separated when you aren't there to supervise, at least until you're sure they get along, so no problems happen when you're not available to redirect.

Puppy and Cat Introduction FAQ

Let's wrap things up with some common questions you might have.

Why do cats and dogs not get along?

It's mostly a matter of body language, honestly! Cats and dogs have similar body shapes and similar actions, but they interpret those actions in almost completely opposite ways, so when a cat is signaling, "Don't come close, I don't want to deal with you," your puppy reads it as "Come play with me!" and when your puppy is staring at the new friend in excitement and playfulness, your cat reads it as aggressive and hunting behavior.

Once your furry friends are familiar with each other, they get to know how to deal with these things, but the socialization process takes time.

How long does it take to socialize a puppy with cats?

This can depend a lot on the personalities of both the puppy and the cats. Some cats don't care much and take to any new friend almost immediately.

Others are very standoffish and will be defensive for a long time. Expect at least a month or two of socialization before you can let them be, and possibly more.

One thing to be aware of is that if you have cats that were strays or have had bad experiences with dogs in the past, it's going to be even harder to socialize them.

It should be possible, just time-consuming, so know what you're getting into before you sign the paperwork to adopt the puppy. There's nothing worse for the puppy or the people than having to surrender a puppy back to a shelter when they don't fit in with your existing household.

Does the breed of the puppy matter?

A little, but not as much as you might think. Different dogs of the same breed can have very different personalities, after all.

Dogs with more of a prey drive will have a harder time with initial socialization, and dogs with high energy levels will be more difficult for a cat to get used to. Larger puppies can present more of a challenge to cats as well, though small breed dogs can be more defensive.

Every dog presents their own challenges, though, so don't assume a rigid schedule is going to work. Adapt to the interactions you see!

What should you watch out for?

The biggest is when one animal bullies the other. We usually think of dogs as the dominant in these relationships because they're larger, but cats can be aggressive enough to counteract that and harass the puppy into submission.

Unfortunately, this stresses out the puppy and can lead to them lashing out when they're larger, which can injure or even kill a cat. Definitely make sure you're an advocate and mediator for both sides so they can't build up this kind of relationship.

You should also make sure that you feed them properly, in ways that they can't steal each other's food. Defensiveness over food is one of the biggest causes of problems between cats and dogs, so make sure to mediate it.

Do you have any other questions that I didn't cover in this article? If so, be sure to let me know in the comments section! I'd be more than happy to help you out.