Lost one of our female cats but just prior to that incident, a young male cat arrived. Neither females liked him and after the death of 1, the other was extremely upset which only made the male (now neutered) more aggressive. Once I started using this product things improved. The cats now share a double bowl. They are not buddies but will lie on the porch at the same time. Both have the drops on their food. Was out for a short time and they reverted. Will not be out again.
I have used this product as well as Homeopet Digestive Upset and I can say that these products do work. I use both products by putting drops in the drinking water. I always have at least 4 to 6 cats in my home as rescues and some of the stress behaviors include vomiting, spraying, anxiety, biting,and scuffles. Products also work on hairballs. I have no idea how they work but they have worked exceptionally well for my family and I highly recommend them for any stress driven behaviors. Once you stop the drops though, the behaviors may begin again.