Does this work better than the Classic? I feel like my cat is getting used to the Classic and it doesn’t calm him as much as it used to.

I have used the multi- cat on & off for years with excellent results, but I wanted to give the optimum. Not sure if it's necessarily better (both are equally effective for us) but it definitely works faster. For your situation, switching to a different formula is worth a shot.

Can the same diffuser i have for the multi cat be used for this?

The instructions actually say to not use another brands diffuser for the refills, and not to use another brands refills in the diffuser. It does not specifically say to not use another one of their own diffusers. I will say I used my old multi cat diffuser and it was fine and worked well.

Can this be plugged in 220v or just 110v?

I believe it would only be safe to use in 110 volt.

Can you use this in a dog friendly home with two cats?

You may want to contact Feliway directly for the best answer. That said, the cat pheromones shouldn't effect your dog. If your dog is a chewer I recommend plugging in somewhere the dog can't reach it since it's ball shaped (or train the dog that it's strictly off limits).

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FELIWAY Optimum, Enhanced Calming Pheromone 30-day Refill – 1 Pack, Translucent

Product ID: 377151994

Details

Brand
FELIWAY
Colour
Translucent
Material
Plastic
Recommended uses for product
Home
Scent
Unscented

⏳30-day continuous calming

📏700 sq ft coverage

🔌Plug-in diffuser refill

Description

🐾 Elevate your cat’s zen—because stressed cats don’t trend.

SEAMLESS INTEGRATION - Plug-in refill designed exclusively for FELIWAY Optimum diffuser for maximum effect.
EXPERT BACKED FORMULA - Powered by 25+ years of feline stress science for trusted, drug-free comfort.
CLINICALLY PROVEN CALM - 93% of cat owners report enhanced feline tranquility with a 9.1/10 satisfaction.
LONG LASTING EFFICIENT - One refill covers up to 700 sq ft for a full month of continuous pheromone release.
BROAD SPECTRUM STRESS RELIEF - Targets scratching, spraying, tension & fears for a truly calm cat.

FELIWAY Optimum Enhanced Calming Pheromone 30-day Refill is a scientifically advanced, drug-free solution designed to reduce multiple signs of stress in cats, including scratching, urine spraying, and inter-cat conflicts. Backed by over 25 years of feline stress expertise, this refill powers a plug-in diffuser that continuously releases calming pheromones across up to 700 square feet for 30 days, ensuring your cat’s environment stays serene and balanced. Trusted by 93% of cat owners, it’s the ultimate upgrade for any cat-loving professional seeking peace of mind and a harmonious home.

Specifications

ASIN	B09885JMHL
Auto Shutoff	No
Best Sellers Rank	#19,902 in Pet Supplies ( See Top 100 in Pet Supplies ) #474 in Cat Health Supplies
Brand	FELIWAY
Capacity	48 ml
Color	Translucent
Customer Reviews	4.4 4.4 out of 5 stars (11,441)
Date First Available	29 June 2021
Item Weight	45.4 g
Material	Plastic
Model Number	D92120K
Power / Wattage	1 watts
Product Dimensions	84.76 x 84.76 x 84.76 cm; 45.36 g
Runtime	30 minutes
Special Features	Long Lasting Aroma

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