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Feliway MultiCat Diffuser Refill (48 mL) | Constant Harmony & Calming Between Cats at Home

TLDR Review: Feliway MultiCat Diffuser Refill

By ShopSavvy Team

Published: June 9th, 2026

Pros

•Effectively reduces cat conflicts and prevents daily fights over a tweek period
•Promotes increased affection and calm behavior in cats
•Helps create a more peaceful and less stressful environment for both cats and humans
•Easy to use with straightforward plun design for targeted coverage in shared spaces
•Positive overall results in improving feline coexistence and minimizing destructive behavior
•Effectively reduced fighting and aggression between the cats after one week of use
•Helps calm and settle anxious or stressed cats, creating a more harmonious environment
•Easy to administer without causing distress to the cats
•Can be used as a nonvasive way to manage behavioral problems without medication
•Suitable for prtress calming, such as before a potentially stressful event

Cons

•The diffuser heats up significantly during use, becoming very hot to the touch and posing safety concerns
•Overheating can cause the device to melt, emitting smoke and potentially triggering fire alarms
•Needs regular monitoring to prevent safety hazards like overheating or melting
•Some users found the product to be ineffective at reducing fighting behavior after multiple attempts
•A few cats, especially territorial or aggressive ones, may become more agitated with the diffuser nearby
•It can be expensive for limited results, with some reviews describing disappointment in its efficacy
•Certain cats may experience allergic reactions or flarps, including redness and eye irritation
•Not all users see consistent or noticeable results, making it a less reliable solution for some households

Bottom Line

Based on reviews, the Feliway MultiCat Diffuser Refill can often promote calmness and reduce tension among cats, but safety concerns around overheating are a major downside. We recommend carefully monitoring the device if you decide to try it, especially given the heating and safety risks. If safety or reliability are priorities, you might want to explore other calming options or diffusers designed with better heat management.

Lowest at Amazon

$30.00 at Amazon

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 68 retailers to give you the short version.