Review on SENTRY Calming Collar CAT Good Behavior Pheromone 3 Pack: Promote Peaceful Feline Behavior with this Effective Solution by Ashley Andrews

It's dangerous - non-removable collars. I would give zero stars here, but I don't see how. We have two cats and they have had some issues spraying around their litter box. We've had some success with pheromone diffusers, so we thought these collars might be worth trying. Our cats have never worn collars as they are domestic cats so it was very difficult to collar the first cat. The clamps are very thick and are not easy to tighten. While we were trying to put the collar on our second cat, the first was in the next room trying to remove the collar with both paws. As he struggled against it, it somehow pinched his throat and began choking him. The next terrifying minutes were spent grabbing him as he could hardly breathe and thrashing about. We ended up having to hold him down and use scissors to cut off his collar. One of the worst moments. I hope this doesn't happen to anyone, but I had to share this experience as a warning, especially if your cats are unfamiliar with collars.