Sentry Behavior Portable Calming Diffuser Refill for Cats, 2 count

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At a Glance

  • Calming
  • Made in USA
  • All Lifestages

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About This Item

Details

  • The Sentry Portable Calming Diffuser is designed to help reduce issues like scratching, marking, or excessive meowing that your cat may experience when anxious.
  • This diffuser refill passively releases pheromones to help reduce stress-related behavior at home or on the go.
  • The portable design requires no batteries or electricity, bringing comfort and calm to your cat wherever they need it.
  • The Sentry Portable Calming Diffuser helps manage your cat’s stress and stress-related behavior.
  • Passively releases calming pheromones for up to 30 days in any area that covers up to 700 square feet.

Ingredient Information

Balance. Support. Promote

For over a decade, Sentry has worked with leading pet experts and top universities, researching effective ways to help pets lead happier, less stressful lives.

Sentry Understands Anxious Pets

Sentry uses pheromone technology to effectively change your pet’s behavior. With the help of their products, good behavior is right around the corner.

Change the Behavior, Not the Pet

Pets can’t talk, so they show they’re scared, frustrated, or not feeling well by changing their behavior. Give them the help they need for excessive barking or meowing, jumping on guests, licking, scratching, and spraying with the Sentry line of behavior products.

About Sentry

Sentry pheromone technology helps promote balanced behavior with science-backed solutions. Help your pet stay cool, calm, and collected with Sentry Behavior.

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Reviews
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4.2
Rated 4.2 out of 5 stars
59 Ratings
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Customers Mention

Chewy identifies key considerations with the help of artificial intelligence and our veterinarians.

Coverage Area

87% Positive

Duration

76% Positive

Ease of Use

87% Positive

Effectiveness

81% Positive

15 Customer Reviews

Rated 4 out of 5 stars
By Carolyn on Dec 10, 2025

Sentry’s portable diffuser

I believe it fades quickly compared to the plugin those had started to leak after a while! I think they work (their not so ornery)

I believe it fades quickly compared to the plugin those had started to leak after a while! I think they work (their not so ornery)

Rated 5 out of 5 stars
By Toni on Sep 13, 2025

Calming portable diffuser

Not all of my outlets will work for the plug in type so I bought a couple of these to place in non electric areas. I can tell when they dry out the cats start fighting

Not all of my outlets will work for the plug in type so I bought a couple of these to place in non electric areas. I can tell when they dry out the cats start fighting again.

Rated 5 out of 5 stars
By Stephanie on May 25, 2025

Finally a non-plug option!

LOVE that you can put this anywhere to help create a calm space! I've used the plug in for years, but I can "smell" it in smaller spaces. This is perfect and well

LOVE that you can put this anywhere to help create a calm space! I've used the plug in for years, but I can "smell" it in smaller spaces. This is perfect and well priced. How long they last will depend on the temps, etc in your house but it seems to last over a month for us.

Rated 2 out of 5 stars
By Jessica on May 21, 2025

Disappointed

I was really excited to try a pheromone option that wasn’t a plug-in. Unfortunately I didn’t notice any results at all and will not be purchasing again. It may work

I was really excited to try a pheromone option that wasn’t a plug-in. Unfortunately I didn’t notice any results at all and will not be purchasing again. It may work for other cats, but didn’t for mine.

Rated 5 out of 5 stars
By Annie on Oct 27, 2025

No need for electric outlet or extension cord

Great when you dont have enough outlets.

Great when you dont have enough outlets.

Rated 4 out of 5 stars
By SUSAN on Dec 19, 2025

Easy to use and doesn’t need outlets

I think it helps

I think it helps

Rated 5 out of 5 stars
By Dianne on May 15, 2025

Didn’t need an electrical outlet

It actually lessened the anxiety between my two cats

It actually lessened the anxiety between my two cats

Rated 5 out of 5 stars
By Connie on Oct 20, 2024

Easy to Use and More Effective for My Cat

I have discovered that my cat responds better to this phermone product than Feliway Optimum. Not every cat will, but the ease of using the product makes it worth

I have discovered that my cat responds better to this phermone product than Feliway Optimum. Not every cat will, but the ease of using the product makes it worth trying. I can put it anywhere. Instead of finding an electric outlet available and it blocking both plugs in the outlet, you can place this anywhere. Having it in the center of the room and not by the floor makes it work better. A very nice thing is it is not messy and oily like the Feliway product when handling it.

Rated 5 out of 5 stars
By Debbie on Nov 15, 2024

Helps my cats

I like that it sits on my end table and doesn't need to be plugged in. My boy cat is scared of thunderstorms and I usually have to give him a herbal stress relief

I like that it sits on my end table and doesn't need to be plugged in. My boy cat is scared of thunderstorms and I usually have to give him a herbal stress relief but with this I haven't had too.

Rated 3 out of 5 stars
By Patricia on Dec 20, 2024

Calming Chews

THEY WORK! Follow dosage directions. I give before I go to bed so we all sleep at the same time.

THEY WORK! Follow dosage directions. I give before I go to bed so we all sleep at the same time.