Do comfortzone refill fit in the feliway difusers?

90% Sure yes. I've been using Comfort Zone & Feliway interchangeably, just what I can get ahold of, and haven't had a diffuser fit problem.

Does the 2x refill work with the original diffuser, I see the outer casing is different, is that needed for the 2x to be effective?

Yes, they are backward compatible.

Do all contain a diffuser?

No, there is no diffuser in this pack. You will see a picture of the diffuser on the front of the package of those that contain a diffuser(s).

How well does it work for indoor cats marking because outdoor strays are driving them crazy?

I've not used these specifically in that situation, though I know exactly how aggravating that is! I've introduced several rescued feral cats into my main group of indoor cats in years past, and only wish I would have had this product back then. I can't say it will fix the problem you're having, but if it were me, I would sure TRY it. I'd saturate the home with the plug-in diffusers, then spray directly on whatever areas your cats are in when they see/hear the outdoor cats. I honestly think it would be worth a try. Right now I have an outdoor kitty who comes and lies up against the door here (I take care of her, feed her, and she has shelter and a heated bed!), but my indoor cats here just lie against the door on the INSIDE when they hear her. No meowing, no crying, no scratching. I'm in a small apartment and two plug-in diffusers seem to work wonders. I personally hope to never be without this product... even my petsitters always remark on how they "can't believe how well everyone in here gets along". Good luck.

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COMFORT ZONE Multi Cat Calming Diffuser Refill, 6 Pack – Cat Calming Pheromone Refills Help Reduce Anxiety, Stress, Scratching, Urine Marking, Multi-Cat Aggression, (30-Day Refills, 180-Day Supply)

COMFORT ZONE Multi Cat Calming Diffuser Refill, 6 Pack – Cat Calming Pheromone Refills Help Reduce Anxiety, Stress, Scratching, Urine Marking, Multi-Cat Aggression, (30-Day Refills, 180-Day Supply)

Product ID: 113963855

⏳30-day continuous calming per refill

🐾reduces multi-cat aggression & stress

🔄reusable diffuser, eco-friendly monthly refills

S$86

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Description

🐱✨ Keep your cats chill and your home drama-free—because calm is the new cool!

LONG LASTING CALM - Each refill provides 30 days of continuous, drug- and fragrance-free stress relief.
ECO SMART COST EFFECTIVE - Reusable diffuser supports up to 12 months with easy monthly refills—sustainability meets savings.
SUBSCRIBE SAVE CONVENIENCE - Never run out—automatic deliveries keep your home calm while you save time and money.
STRESS FREE MULTI CAT HARMONY - Calming pheromones reduce scratching, fighting, and urine marking for peaceful coexistence.
TRUSTED BY EXPERTS FOR 20 YEARS - Backed by decades of proven results, recommended by veterinarians and cat behaviorists alike.

Comfort Zone Multi Cat Calming Diffuser Refills deliver a drug- and fragrance-free pheromone formula that mimics natural cat calming signals, reducing stress-induced behaviors like aggression, scratching, and urine marking in multi-cat households. Each refill lasts 30 days and fits reusable diffusers designed for up to 12 months of use, covering 400 sq ft per room. Trusted for over 20 years and safety-certified, these refills promote a serene environment for cats and peace of mind for owners.

Specifications

ASIN	B07MW3DG5M
ASIN	B07MW3DG5M
Age Range Description	All Life Stages
Best Sellers Rank	#1,880 in Pet Supplies ( See Top 100 in Pet Supplies ) #12 in Cat Relaxants
Brand Name	Comfort Zone
Customer Reviews	4.5 4.5 out of 5 stars (10,616)
Date First Available	January 17, 2019
Date First Available	January 17, 2019
Directions	The diffuser gently warms to disperse calming pheromones throughout the room. Plug the diffuser into a wall outlet in an upright position, with the vents pointing toward the ceiling, near where your cat spends the most time. Always keep the diffuser upright—never plug it in upside down, sideways, or into a power strip on the floor. We recommend plugging it into the top outlet to leave the bottom o…
Included Components	6 Comfort Zone MultiCat Diffuser Refills
Item Dimensions LxWxH	5.63 x 3.69 x 3.56 inches
Item Package Dimensions L x W x H	5.61 x 3.78 x 3.6 inches
Item Weight	13.6 ounces
Item model number	100538644
Item model number	100538644
Manufacturer	Central Garden & Pet
Manufacturer	Central Garden & Pet
Material	Plastic
Model Name	Comfort Zone Multi Cat Calming Diffuser Refills
Number of Items	6
Product Dimensions	5.63 x 3.69 x 3.56 inches; 13.62 ounces
Size	6-Pack
Specific Uses for Product	Behavior, Indoor, Urinary Tract Control
Style	Multi Cat Calming Diffuser
Target Audience Keyword	house-cats
Warranty Description	Satisfaction guaranteed. If you’re not satisfied within 90 days, call us at 800-234-2269 so we can make it right. Proof of purchase is required.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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S$86

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to SINGAPORE.

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TrustScore 4.5 | 7,300+ reviews

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