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FELIWAY® Optimum Enhanced Serenity Plug-in Diffuser Refill for Cats

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  • £23.03 £38.99 Save £15.96 1 x 48ml Refill Vial
  • £58.99 £62.99 Save £4.00 3 x 48ml Refill Vials
SRP £38.99

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This FELIWAY® Optimum Plug-in Diffuser Refill is the best answer for enhanced serenity, when used with the FELIWAY® Optimum Plug-in Diffuser helping to resolve all typical stress-related signs. FELIWAY® Optimum sends a message of calm to your cats, creating reassurance and peace between cats living together; cats feel more relaxed and safe in their house.

Get an extra 10% off new and existing subscriptions for FELIWAY® Plug-In Diffuser refills until 30th June 2024.Terms and Conditions Apply.

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Product Details

Our modern life can be challenging for our cats: Living with humans can be difficult as we have busy, ever-changing households and routines. FELIWAY® Optimum can be used for everyday comfort in the home.

FELIWAY® Optimum is recommended if your cat is peeing/spraying or damaging furniture or walls by scratching. Or if your cat appears stressed out by hiding, reduced activity, reduced appetite, or over-grooming.

It is also recommended if you anticipate changes in your life and house: moving home, restoration, painting, the arrival of a new companion animal, a new baby…

If your cats living together fight (even for an extended period) or are indications of tension such as running after each other, staring or obstructing.

The FELIWAY® Optimum Enhanced Serenity Plug-in Diffuser Starter Pack for Cats is available to purchase here.


Just plug and play: screw the vial into the diffuser unit and place it into an electric socket in the area where your cat spends most of its time. In the room where your cat allocates most of its time. You can also use it where tension or battles usually happen.

For the best results, leave the diffuser on all the time and renew the refill bottle monthly.

We recommend using an additional diffuser if the room is more significant than 70m2 (approx. a three-bed house).

Try not to plug the diffuser under items (e.g. shelves) or close to objects (e.g. behind curtains or doors), as this affects efficacy.

FELIWAY® Optimum Enhanced Serenity Plug-in Diffuser Refill for Cats is available in the following sizes:
  • 1 x 48ml Refill Vial
  • 3 x 48ml Refill Vials
Key Benefits
  • A reinforced effect with a new pheromone discovery
  • Easy to use
  • Helps to resolve all typical stress related signs
  • Clinically proven
  • Veterinary used and recommended
  • Trusted for over 25 years
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