7,000+ 5-star ratings
FELIWAY® Optimum Diffuser Kit
When stress shows up as hiding, scratching, spraying, or tension between cats, your cat may be telling you that home no longer feels safe. FELIWAY® Optimum releases advanced calming messages around the clock to help your cat feel more secure, settled, and comfortable in the space they call home.
30-Day Money-Back Guarantee
How quickly can I expect results?
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Many cat parents begin noticing signs of enhanced serenity within the first 7 days. Every cat is different, so keep the diffuser plugged in continuously for at least 30 days before judging the full effect.
Where should I plug it in?
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Place it in the room where your cat spends the most time. Keep at least 4 feet of clear space above it and avoid placing it behind furniture, curtains, doors, or shelves.
Shipping & Delivery
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Shipping is free for a limited time. Once your order is processed, delivery typically takes 5 to 9 business days.
30-Day Money-Back Guarantee
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Try it in your home for a full 30 days. If it is not the right fit for you and your cat, contact us within 30 days of delivery for a refund under our return policy.
What Cat Parents Are Noticing
Noticeably More Relaxed
"I started seeing a subtle change after a few weeks. My cat was less jumpy around noises and seemed much more comfortable at home."
Peace In Our Multi-Cat Home
"The staring and stalking eased, and our cats finally started coexisting more peacefully. It made a real difference in our household."
Took The Edge Off
"Bringing home two rescue cats created instant tension. The diffuser helped soften the hissing and fighting so everyone could settle in."
A Calmer Home, Starts With One Plug
Your cat cannot tell you when the room feels overwhelming. Instead, stress may show up as hiding, scratching, spraying, overgrooming, or tension with another cat. FELIWAY® Optimum helps create a more reassuring home environment using advanced calming messages inspired by natural feline pheromones.
How It Fits Into Your Routine
Twist in the 48 mL refill, plug the diffuser upright into the room your cat uses most, and leave it switched on. It works continuously in the background for up to 30 days, so calm does not depend on you remembering another daily step.
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Supports More Signs Of Stress
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24/7 Calming Messages
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Up To 700 Sq Ft Coverage
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30-Day Refill
Less Tension. More Togetherness.
Stress is not always loud. It can look like a cat disappearing under the bed, guarding doorways, scratching the sofa, spraying, or staring down another cat. FELIWAY® Optimum is designed to help with more signs of stress across more everyday situations.
Use it before changes whenever possible, such as moving, decorating, visitors, a new pet, or a new baby. For ongoing tension, keep it plugged in continuously so your cat receives steady calming support day and night.
How quickly can I expect a change?
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Many cat parents begin noticing signs of enhanced serenity within the first 7 days. Every cat is different, so use it continuously for at least 30 days before judging the full effect.
Where should I plug it in?
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Use it in the room where your cat spends the most time. Keep at least 4 feet of clear space above the diffuser and avoid placing it behind furniture, curtains, doors, or shelves.
What stress signs can it help with?
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FELIWAY® Optimum is designed to support cats showing signs such as scratching, urine spraying, hiding, reactions to change, and tension or conflict between cats.
Can I use it in a multi-cat home?
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Yes. It can help create a calmer shared environment when cats are chasing, staring, blocking, or struggling to settle around one another. Use one diffuser per 700 square feet.
How long should I keep using it?
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Use it continuously for at least one month. Many cats benefit from ongoing use, especially during persistent tension or repeated changes at home.
What is included in the kit?
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You receive one FELIWAY® Optimum diffuser and one 48 mL refill designed to provide continuous calming support for up to 30 days.
Built For Everyday Cat Stress.
One simple diffuser supports the moments that can make your cat feel unsettled at home.
FELIWAY® Optimum uses a patented pheromone complex that mimics natural calming messages cats recognize. It helps create a familiar, reassuring atmosphere while your cat continues with their normal routine.
Stress does not follow a schedule. Leave the diffuser plugged in around the clock so calming messages stay present through visitors, noises, home changes, and everyday tension between cats.
One diffuser supports an area up to 700 square feet. Place it in the room your cat uses most, with clear space above it, so the calming messages can circulate properly.
Each 48 mL refill lasts up to 30 days. Replace the refill monthly and the diffuser head every 6 months to maintain consistent performance.
Plug It In. Let Calm Settle In.
FELIWAY® Optimum works quietly in the background, so you do not have to chase your cat with sprays, hide tablets in food, or remember another daily step. Keep it plugged in where your cat spends the most time and let the calming messages become part of the room.
Use it during moves, renovations, visitors, new-pet introductions, or ongoing tension between cats. For best results, start before a known change and keep it switched on continuously.
Trusted Calm By The Numbers
Proven expertise, simple daily use, and whole-room support.
Trusted Calm By The Numbers
Proven expertise, simple daily use, and whole-room support.
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Years of feline stress expertise and scientific research behind the FELIWAY® brand.
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5-star Amazon ratings from cat parents who chose FELIWAY® for a calmer home.
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Square feet of continuous coverage from one correctly placed diffuser.
* Product performance varies by cat and home environment.
Real Homes, Real Cat Parents
"After a few weeks, my nervous cat seemed less jumpy and handled everyday noise much better. The improvement was subtle, but it was noticeable."
"The tension in our multi-cat home eased. There was less staring and stalking, and the cats started coexisting more peacefully."
"We introduced two rescue cats and the house was chaotic. The diffuser helped take the edge off the hissing and fighting."
"When the refill gets low, my cats start arguing again. Replacing it makes a clear difference in our home."
Frequently Asked Questions
Everything you need to know before creating a calmer home for your cat.
How quickly can I expect results?
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Many cat parents begin noticing a change within the first 7 days. Every cat is different, so use FELIWAY® Optimum continuously for at least one month before judging the full result.
Where should I place the diffuser?
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Plug it into a standard outlet in the room where your cat spends the most time. Keep at least 4 feet of clear space above it and avoid shelves, curtains, doors, and furniture.
How much space does one diffuser cover?
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One correctly placed diffuser provides continuous calming support for an area up to 700 square feet.
Should I leave it plugged in all day?
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Yes. Keep it switched on 24/7 so the calming messages stay consistent, especially during home changes or ongoing multi-cat tension.
What comes in the starter kit?
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The kit includes one FELIWAY® Optimum diffuser and one 48 mL refill that lasts up to 30 days.
How often should I replace the diffuser?
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Replace the 48 mL refill every 30 days and replace the diffuser head every 6 months for consistent performance.
Where should I place the diffuser?
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Plug it into a standard outlet in the room where your cat spends the most time. Keep at least 4 feet of clear space above it and avoid shelves, curtains, doors, and furniture.
Should I leave it plugged in all day?
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Yes. Keep it switched on 24/7 so the calming messages stay consistent, especially during home changes or ongoing multi-cat tension.
How often should I replace the diffuser?
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Replace the 48 mL refill every 30 days and replace the diffuser head every 6 months for consistent performance.
30-Day Money-Back Guarantee
Try FELIWAY® Optimum in your home for a full 30 days. If it is not the right fit for you and your cat, contact us within 30 days of delivery for a refund under our return policy.
TRY IT RISK FREE
100% Satisfaction
Fast Shipping
Easy Returns
30-Day Money-Back Guarantee
Try FELIWAY® Optimum in your home for a full 30 days. If it is not the right fit for you and your cat, contact us within 30 days of delivery for a refund under our return policy.
TRY IT RISK FREE
100% Satisfaction
Fast Shipping
Easy Returns