FELIWAY MultiCat Pheromone Diffuser Refill — 1-Pack, 4-Week Calming for Multi-Cat Homes (700 sq ft)

FELIWAY MultiCat is a plug-in pheromone diffuser refill that helps reduce tension and conflict between cats in multi-cat households.

Designed by the veterinarian-recommended FELIWAY brand, this single refill delivers continuous calming support for up to four weeks and covers areas up to 700 sq ft. It uses a synthetic analogue of the natural maternal feline facial pheromone to encourage friendlier interactions, lessen staring, blocking, chasing and other signs of inter-cat stress, and support a more peaceful home environment without sedation. The refill fits into any compatible FELIWAY diffuser unit and is easy to replace so you can maintain steady support in communal spaces.

How quickly will I notice a difference between my cats?

Individual responses vary, but many cat owners report behavioral improvements within a few days to a few weeks of continuous use. For best results, keep the diffuser plugged in 24/7 and positioned where cats spend time together.

• Typical onset: days to a few weeks with continuous use
• Full effect often visible after several weeks of steady coverage
• One refill provides up to 4 weeks of continuous diffusion

Where should I place the diffuser to cover my living space effectively?

Place the diffuser in an open outlet within the shared area where cats interact most. Avoid hiding it behind furniture; vents should point upward and the unit should have at least 4 feet of clearance for optimal diffusion.

• Covers up to 700 square feet per refill
• Use one diffuser per common living area or per 700 sq ft
• Keep vents unobstructed and plug into an upright outlet

Is FELIWAY MultiCat safe for kittens, other pets, and family members?

FELIWAY MultiCat is non-sedating and formulated to be safe for use around cats, kittens, people and many other household pets when used as directed. It provides behavioral support without drugs, but always follow label instructions and consult your veterinarian for specific health concerns.

• Non-sedating, pheromone-based formula
• Safe for multi-pet households when used correctly*
• Not a medication—complements behavioral management strategies

How do I replace and maintain the refill for continuous calming?

Replacing the refill is straightforward: unplug the empty vial, insert a new FELIWAY MultiCat refill into your compatible diffuser, and leave it powered 24/7. For uninterrupted support, replace the refill every four weeks and keep the unit in an open, well-ventilated area.

• Replace every 4 weeks for continuous coverage
• Use compatible FELIWAY diffuser units (plug-in style)
• Store refills upright and follow disposal instructions on the label

Who is this for? FELIWAY MultiCat refill is ideal for households with two or more cats experiencing tension, rivalry, or changes in social dynamics—such as introductions, new pets, or stress from home changes. It’s suited to cat owners who prefer a non-medicated, vet-recommended behavioral support tool to encourage calmer interactions. Use alongside environmental enrichment, routine, and veterinary guidance for a well-rounded approach to multi-cat harmony.

*When used as directed. Based on a survey of veterinarians.

Ingredients

pheromone