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).

Optimum Enhanced Calming Pheromone 30 Day Refill 6 Pack

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Description

🐾 Elevate your cat’s zen—because calm is the new cool.

DRUG FREE SERENITY - Non-sedating, safe for cats and humans alike—pure pheromone power without side effects.
BROAD HOME COVERAGE - Each diffuser blankets up to 700 sqft, perfect for modern open-plan living spaces.
ALL IN ONE 6 PACK REFILL - Half a year of tranquility with six easy-to-use vials—never run out of calm.
VET RECOMMENDED TRUSTED - #1 vet recommended brand with 25+ years of feline stress expertise.
SCIENTIFICALLY PROVEN CALM - 77% less urine spraying & 70% less fear reactions—stress relief you can measure.

FELIWAY Optimum Enhanced Calming Pheromone 30-day Refill 6-Pack delivers a patented, vet-recommended formula that reduces common cat stress behaviors by over 70%. Each vial provides a full month of drug-free, non-sedating calming support, covering up to 700 sqft, making it ideal for multi-cat households and large living spaces. Trusted by millions worldwide, this refill pack ensures continuous feline tranquility with scientifically backed results.

Specifications

ASIN	B09V9WC1S1
Best Sellers Rank	#21,321 in Pet Supplies ( See Top 100 in Pet Supplies ) #497 in Cat Health Supplies
Brand	FELIWAY
Color	Clear
Customer Reviews	4.5 4.5 out of 5 stars (1,892)
Date First Available	6 May 2022
Item Weight	430 g
Model Number	D92160B
Package Dimensions	15.8 x 10.21 x 9.7 cm; 430.91 g

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Optimum, Enhanced Calming Pheromone 30-day Refill – 6 Pack

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