Sentry 02101 HC Good Behavior Pheromone Collar for Cats, 15 Inches

Well i bought this after reading about this in the forum here, because i recently moved with my cat from my home country to europe. My home country being Brazil, my cat has short hair and is adapted to going outside, having sun, etc. And in here there is no such thing and is a small apartment. My cat went nuts, needless to say. It would cry all night long and we couldn't sleep at all. I had to order the colar from amazon so it took like 2 weeks and a half to get here, and in the meantime the cat stopped crying all night. When it got here i put it on him immediately, and i really didn't notice much of a difference. It DOES look a little calmer (being that is such an active cat) but we still can't sleep during the night, because now the problem is that 3am is the playtime, so he tries to wake us up. But that has nothing to do with the collar effectiveness.

For me, i won't remove the collar for this month, because my cat needs to adapt and i think it is kind of helping him to do so. It's a big change, and if you have a kitty that is in a bizarre new place, that is really hard on them, so even if they will act out or not, it's better to prevent and get them something like this collar or the diffuser, to help them adapt, and so they can feel at home right away! :)

Hope it helped

When I brought King Arthur's pregnant mother in to my home, all my kitties were very accepting and helpful... Except for my Paige. She became very stressed out. Marking and showing aggression and displeasure at the new kitty and her kittens. I tried everything... Feliway and even stress tablets to no avail. At the end of my rope, my vet recommended the Pro Pet Calming Collar. I was skeptical. But within minutes, I could see a change!!! Now, you can no longer get the Pro Pet collar (I just talked to my vet on the phone. They discontinued it and he happened to get some boxes of it. But once that is gone. That's it.) Much to the dismay of everyone who has tried it.

It works by mimicing the mothers pheremones to calm a cat. They work for a month or more. But trust me, DO NOT take off a collar until you have one to replace it.

However, there is a light at the end of the tunnel, this collar also seems promising. The Good Behavior Calming Collar, It seems to be close to the same thing.

All I know is my darling Paige is her sweet self again.  No stress.  No marking.  No aggression.  I can't say enough about these little miracle workers!!  I highly recommend them to anyone who has a kitty that is stressed like my Paige was.