Comfort Zone Calming Opticalm Diffuser Kit for Cats 2-Pack

I had 3 cats, one is 14 and is super crabby. She tolerates one of the boys,Tyson 6 Scottish Fold,but not Max 4 Scottish Fold. She's been getting better with Max but...so when I decided to suddenly add 2 more little ladies to our group? I knew I was going to need help. I had used the "other" well known brand spray because it was sitting in the vets office to use and it really made the visit a lot easier so I hoped that this would be just as effective, especially since this came in larger packaging sizes. With 5 cats, I'm going to need a lot of them going all at once. I can honestly say that the hissing is minimal, I haven't heard even one cat fight which is the biggest surprise ever. I completely expected to hear at least one but I think I can say that this is as effective as the slightly more expensive competition!