Honestly, I did not anticipate this product working but was willing to give it a try- What happened, the product actually worked! We recently had several life changes in about a 7 month period and the kitties had started to get "hissy" with one another. Once we settled in a location we realized they had almost like anxiety and were hissing and growling at each other, even over toys and scratching posts. We purchased this and used it the first day. I sprayed it in the air and within minutes they were laying down and grooming themselves and had forgot what they originally had been "hissy" about! We also purchased the purple calming collars but they have not arrived, yet. And we purchased the diffuser for the outlet. All in all-the spray is our go too now!