How to Introduce a Cat to a Dog Safely

Before you start

Think about the animals you are putting together.

• Your dog's history. Has your dog lived with cats before? Do they chase squirrels, birds or cats outside? Dogs with a strong chase instinct, including some terriers, sighthounds and herding breeds, may need extra care, though individuals vary a lot.
• Your cat's temperament. Confident, dog-savvy cats often adjust faster. Shy, elderly or unwell cats may find a dog very stressful.
• Age. Puppies and kittens often adapt more easily, but a boisterous puppy can still frighten or injure a cat, and a kitten is small and vulnerable.
• Training. A dog who reliably responds to their name, "sit", "leave it" and a recall makes everything easier. Practise these in advance with rewards.

If you are adopting from a rescue, ask whether the animal has been tested or has lived with the other species.

Set up the home first

Before the first meeting, make sure your cat has:

1. A dog-free sanctuary. A room with food, water, a litter tray, a bed and hiding places. A baby gate with a cat flap or a gap the dog can't get through works well.
2. High places. Shelves, cat trees and the tops of furniture where your cat can watch from safety.
3. Escape routes in every room. Your cat should never feel cornered.
4. Food and litter out of the dog's reach. Many dogs will eat cat food and investigate litter trays, which is stressful for the cat and not good for the dog.

The step-by-step introduction

Move to the next step only when both animals are relaxed at the current one. If either becomes worried or over-excited, go back a step.

1. Keep them apart and swap scents. For the first few days, let each animal live in their own area. Swap bedding, or stroke one with a soft cloth and leave it near the other's food, so they get used to each other's smell.
2. Swap spaces. While the dog is out for a walk, let the cat explore the dog's area, and vice versa, under supervision.
3. First sightings through a barrier. With the dog on a lead and a helper holding it, let them see each other through a baby gate or across a room. Keep the dog at a distance where they can still take treats and look away from the cat.
4. Reward calm. Each time your dog glances at the cat and then looks back at you, or lies down calmly, give a treat. Let your cat watch from a high spot and reward them with treats or play too.
5. Keep sessions short. A few minutes, a few times a day, is better than one long session. Finish before anyone gets tense.
6. Gradually reduce the distance, still with the dog on a lead, as long as your dog stays calm and your cat shows no signs of fear.
7. Short, supervised time in the same room. Let the dog drag a lightweight lead or house line so you can calmly guide them away if needed. Let your cat choose whether to come closer.
8. Supervise for a long time. Keep them separated when you are out until you are sure they are relaxed together, which may take weeks or months.

Reading their body language

Animal	Going well	Slow down or step back
Dog	Loose body, looks away, sniffs the floor, takes treats	Staring, stiff body, whining, lunging, ignoring treats
Dog	Responds to their name	Fixates on the cat and won't look away
Cat	Relaxed posture, slow blinks, tail up, eating or grooming	Flattened ears, puffed tail, hissing, crouched or hiding
Cat	Approaches out of curiosity	Not eating, avoiding the litter tray, staying hidden

Our guides to understanding cat body language and understanding dog body language explain these signals in more detail.

What not to do

• Don't hold the cat up to the dog, or force them to be close. A frightened cat can scratch and bite, including you.
• Don't let the dog chase the cat, even in play. Chasing can become a habit and can be dangerous.
• Don't punish growling, hissing or barking. These are warnings. Punishing them removes the warning without changing the feeling behind it. Instead, increase the distance and slow down.
• Don't use aversive tools such as sprays or shock collars. They can create fear and make the animals associate each other with bad experiences.
• Don't rush. A setback from going too fast can take longer to fix than going slowly from the start.

When to get help

Some dogs and cats never become friends, and that is okay as long as they can share the home calmly, or live in separate areas. Get help from a qualified, reward-based behaviourist if:

• Your dog stays fixated on your cat despite weeks of gradual work
• Your dog has lunged at, chased or caught the cat
• Your cat is still hiding, not eating or toileting outside the tray after a few weeks

When to call your vet

Stress and injuries can both affect health. Contact your vet if:

• Your cat has been scratched, bitten or caught by the dog, even if the wound looks small. Puncture wounds can hide deeper damage and may become infected
• Your cat stops eating, hides constantly or is weeing outside the tray. See why is my cat hiding
• Your cat is straining to wee or producing little or nothing. This is an emergency, especially in male cats
• Your dog has an eye injury from a cat scratch, or a swollen, painful wound
• Either animal shows a sudden change in behaviour, which can sometimes be linked to pain

Watch how they settle

Small signs show progress: a cat who starts eating in the same room, or a dog who looks away when the cat walks by. Petopedia lets you log food, water, weight and behaviour for each pet, so you can see whether your cat's appetite and litter habits stay steady during the introduction, and notice early if either animal is struggling.