Cat aggression toward another pet in your home can be a stressful situation. But it’s more common than many pet parents think. The good news? You can manage it with simple steps and a calm, steady approach.
Understand the Reason Behind the Aggression
Cats are not naturally aggressive. If they lash out, there’s usually a reason. The common causes include:
- Territorial behavior: Cats see your home as their space.
- Fear or anxiety: A sudden noise or a new pet can cause them fear or anxiety.
- Lack of socialization: If your cat wasn’t raised around other animals, it may not know how to behave.
- Redirected aggression: Your cat becomes upset by something else and directs its anger towards another pet.
Watch your cat closely. What triggers the aggressive behaviour? Is it a new puppy? Or perhaps your cat feels threatened when another pet approaches the food bowl or litter box. Once you find the root cause, you’re halfway to solving the problem.
Start with Slow, Safe Introductions
Never force your cat to meet a new pet right away. Rushing the process can make things worse.
- Keep them separated at first. Use a baby gate, door, or crate.
- Let them smell each other’s scent. Swap bedding or rub a towel on one and place it with the other.
- Short visual sessions. Use a screen or glass door so they can see each other but not interact.
- Use treats. Positive reinforcement builds good associations.
Go slow. Some cats need a few days. Others take weeks or longer. Patience is key.
Give Your Cat a Safe Space

Make sure your cat has a quiet, private area where they can rest. This space should be away from the other pet. Include:
- A cozy bed
- Food and water
- A litter box
- Toys or scratching posts
Cats feel safer when they have control over their environment. A secure zone helps reduce stress and tension.
Reward Calm Behavior
Praise your cat when they stay calm near the other pet. Offer treats or gentle petting. Keep your tone soft. Avoid yelling or punishment. That only adds fear.
If your cat shows signs of calm interest, such as sniffing or sitting nearby without hissing, reward that behaviour right away. These small wins add up over time.
Use Play to Release Energy
Play is a healthy outlet. Use interactive toys like feather wands or laser pointers to burn off energy. A tired cat is often a calmer one.
Make playtime part of your daily routine. If possible, schedule it before introductions or shared time with the other pet. This helps your cat release tension.
Feed Separately
Food can spark aggression. Always feed your pets in separate areas. This avoids fights and helps both animals feel secure.
Over time, you might bring their bowls closer—but only if they stay calm. Never rush this step.
Try Pheromones and Calming Tools
Some cats respond well to calming aids. Try:
- Pheromone diffusers like Feliway
- Herbal sprays or collars
- Soft music made for pets
These tools don’t solve everything, but they can help ease tension.
Stay Consistent and Calm
Your mood affects your pets. Stay calm and speak softly. Stick to a routine. Feed, play, and train at the same time each day. This creates stability and lowers stress levels.
If your cat’s aggression doesn’t improve, talk to a vet or animal behaviorist. They can help rule out health issues or design a behavior plan.
Avoid giving up or rehoming one of the pets too quickly. With time, effort, and guidance, most cats learn to get along.
FAQs:
Why is my cat suddenly attacking my other pet?
Sudden aggression may be triggered by stress, a change in routine, or an underlying illness. A vet check can help rule out medical issues.
Can two aggressive cats ever get along?
Yes. With slow introductions and patience, even cats who don’t like each other at first can learn to live peacefully.
Is spraying my cat a good way to stop aggression?
No. Spraying or punishing can increase fear and stress. Use positive reinforcement instead.
How long does it take for cats to adjust to a new pet?
It can take days or even weeks. Every cat is different. Go slow and don’t rush the process.
Should I keep my pets apart forever if aggression continues?
Only in rare cases. Most cats can adjust with time, training, and a safe setup. Consult a professional if the problems persist.
Final Tips to Keep the Peace
- Don’t punish. It increases fear.
- Avoid holding or trapping your cat during aggression.
- Never leave them alone together until they’re calm and friendly.
- Watch body language: ears back, puffed tail, or growling means they need space.
Give Your Cat the Tools to Succeed
Helping your cat adjust takes time, but the results are worth it. With patience, love, and consistency, you can create a calm and happy home for all your pets.
If you’d like to dive deeper into understanding cat behavior, explore the Animal Wellness Academy’s online cat courses. Their programs offer trusted, science-based advice to help you better connect with your feline friend. You can also check out their wide range of online veterinary courses for guidance on overall pet care and wellbeing.
You’re invited to visit our website today and begin your journey toward becoming the calm, confident pet parent your animals truly deserve.