GentlePaws Cat Calming Collar (2-Pack)

We recently got another cat and I bought this hoping it would help my resident cat relax. Unfortunately, after a week of wearing it, I haven’t noticed a significant difference. It does smell nice and my cat isn't bothered by wearing it, but the shipping took a very long time. I was hoping for better results.

So far these seem to be the miracle worker they claim to be. I have 9 cats and some of them do not get along. Within 10 minutes of putting these collars on each cat, the tension seemed to drop to half. Cant wait to see how they are within a day or so

We are on our 4th set of collars for 2 cats. Things went great with the first 2 sets. Both the 3rd ans 4th have caused hair loss and irritation on the female cat. Had to remove it and she has returned to peeing outside the box. I am giving 2 stars because we have had success in thr past, but I have messaged the company to ask about formula changes with no response.