Sentry Good Behavior Calming Collar for Cats, up to 15-in neck


3.5
Rated 3.5 out of 5 stars
2167 Ratings

1763 Customer Reviews



Rated 5 out of 5 stars
By Bonnie on Jan 12, 2026

One of my best purchases...

When I took Sherman in, he was used to going outside... I wanted him to stay in for his own safety...He cried LOUDLY and constantly day and night...After 10 days

When I took Sherman in, he was used to going outside... I wanted him to stay in for his own safety...He cried LOUDLY and constantly day and night...After 10 days of wearing the collar, he completely lost interest in going out...I tried it on Molly because she was deathly afraid of the other cats...Now she is cautious and aware but has no fear...Next I'm going to put one on Ms. Marble...She's aggressive...These collars really work miracles...You have to give them some time, but they will work...AND the price at Chewy is Great...Got the 3 pack and I saved...


Rated 3 out of 5 stars
By Ashley on Jan 18, 2026

Perfumed but odd reactions

I placed this on my spotted tabby right out of the package. Don't do that. Let air out for a day; too strong. It made him a sparkless zombie. No soul in his eyes

I placed this on my spotted tabby right out of the package. Don't do that. Let air out for a day; too strong. It made him a sparkless zombie. No soul in his eyes. That was weird. My housekeeper took it off him bc he got out caught in his mouth the next day. I returned a week later. Placed it on my anxious white cat, bothered by the others. She seemed no different. But after getting the treats and outdoor time she wanted, she seems really zen.


Rated 5 out of 5 stars
By Rayne on Jan 4, 2026

Cost me $400 to find out shes happy now

These collars were suggested by my vet as a first line defense against my youngest. Two months after that visit, I took her back to figure out why she's gained so

These collars were suggested by my vet as a first line defense against my youngest. Two months after that visit, I took her back to figure out why she's gained so much weight (2lbs in 2 months) recently. After ultrasounds and bloodwork, my vet and I have come to the conclusion that she gained her "happy" weight. I just wish I knew about it sooner!!


Rated 1 out of 5 stars
By Emma on Jan 26, 2026

Wayyyy too stinky!

As other people mentioned these have way too strong of a scent. I couldn’t leave it on long enough to find out if it worked. It made my eyes water, I can’t imagine

As other people mentioned these have way too strong of a scent. I couldn’t leave it on long enough to find out if it worked. It made my eyes water, I can’t imagine having to be the one wearing it!


Rated 1 out of 5 stars
By Catherine on Dec 8, 2025

HORRIBLE SMELL - not safe for asthmatic cats

I’ve tried literally everything for my one stressed cat, and bought these collars as per a vets recommendation. However, the lavender smell is horrific. It overpowered

I’ve tried literally everything for my one stressed cat, and bought these collars as per a vets recommendation. However, the lavender smell is horrific. It overpowered my apartment and only lasted on my cat for about 20 minutes before I couldn’t take it any more. My asthmatic cat had a sneezing fit from being in the same room as the collar and not even having it on him in the 20 minutes.


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

Seems to be helping our “Godzilla!!”

I would say this Sentry collar is definitely helping to calm our troublesome cat Gracie aka Godzilla! Gracie really just wants to be the only cat in our house,

I would say this Sentry collar is definitely helping to calm our troublesome cat Gracie aka Godzilla! Gracie really just wants to be the only cat in our house, the alpha female. We rescued another cat five years ago, who is very timid and sweet. We have tried everything to get Gracie to stop with the jealousy and aggression towards Lizzie. Anytime Lizzie is in close proximity to me, you would hear Gracie his and growl. Now, I wouldn’t say it’s 100% better but maybe 70-75%% better, which is definitely better than what it was without the collar!!! I found out about the collar on Instagram @bethostern which is a wonderful rescue and where we got sweet Lizzie. I hope it works for your kitty!!!


Rated 5 out of 5 stars
By Mandi on Dec 28, 2025

Amazing... If you can handle the smell

Yep, the smell is a pretty terrible chemical perfume but it absolutely stopped my cat's aggression and bullying behavior toward the other. I'm hoping to retrain

Yep, the smell is a pretty terrible chemical perfume but it absolutely stopped my cat's aggression and bullying behavior toward the other. I'm hoping to retrain him with the collar and eventually stop using it.


Rated 3 out of 5 stars
By Vicki on Dec 26, 2025

Calming collar may work

The cats hate wearing collars because they are inside cats. The "Bully" seems a bit better, but I still hear occasional fights. The very anxious cat seems more calm

The cats hate wearing collars because they are inside cats. The "Bully" seems a bit better, but I still hear occasional fights. The very anxious cat seems more calm. I hope it works better the more I use them.


Rated 5 out of 5 stars
By Jacquie on Oct 12, 2025

They WORK!

It’s like a magic wand has been waved over my cats. They are all so much calmer and tolerant of each other. The peeing outside the litter box has stopped. I’ve

It’s like a magic wand has been waved over my cats. They are all so much calmer and tolerant of each other. The peeing outside the litter box has stopped. I’ve literally had them on their necks for four days and I noticed the difference on day one. I swear I think it sounds made up, but it’s not! They totally work! I can only assume that with more time, it will work even better as their experiences with each other aren’t filled with growls and hisses. I’m shook! If you’re having trouble with your kitties, order these collars now!


Rated 1 out of 5 stars
By Holly on Dec 3, 2025

Smells awful

I had to remove this from my cat after a week because the smell was so bad. I was hoping it would fade away, but it smelled like a chemical plant. I could detect

I had to remove this from my cat after a week because the smell was so bad. I was hoping it would fade away, but it smelled like a chemical plant. I could detect the scent when my cat was 5 feet away.