I have two cats, brother and sister from the exact same litter who never had a problem until one of them became disabled due to some tragic accident outside resulting in one of her legs being amputated. The injured cat was gone for a few days for the amputation and when she came home things were never the same. They went from being siblings who got along great to strangers who constantly fought. I think it was a combination of the non-injured cat feeling like a stranger had come home after surgery, the non-injured cat being frustrated about no longer being allowed outside after the other cat was injured and the non-injured cat treating the disabled cat like prey basically once he couldn't hunt anything outside anymore. I tried CBD initially. That didn't work at all. The vet prescribed gabapentin which was a ridiculous recommendation, particularly since they were telling me to only give it one time a day and my research on gabapentin says it only stays in the system 4 hours and can only be used for cat aggression when you know aggression is going to occur (like bringing the cat to the groomer for instance - you could give gabapentin 30 minutes before bringing the cat to the groomer to prevent cat aggression while at the groomer) but you can't give gabapentin once a day and expect it to control aggression all day long when it only stays in the system 4 hours. I don't know what my vet was thinking. After realizing that my vet had prescribed a medication under a complete nonsense theory, I started to do my own research on medications that I could buy over the counter online, hoping that I might find something myself that would work that was non-prescription since my vet obviously had no clue how to help us. That search resulted in me finding this peacemaker med. I've watched every episode of My Cat From Hell and truly believe Jackson Galaxy is an expert, so I was psyched when I found this and couldn't wait to try it. We've spent 2 years with these two cats fighting and nothing working to stop it. I even tried multi-cat household calming plug-ins that plug into your outlet and supposedly give off some kind of scent only cats can smell that's supposed to calm multi-cat households and those didn't work either. Since using this med, the aggressive cat is no longer bothering or attacking the disabled cat and the disabled cat went from hissing at the aggressive cat basically every time it came near her to allowing the formally aggressive cat to jump up right on the bed next to her without her hissing or feeling threatened by the other cat's presence. Prior to this med, the disabled cat didn't even want her aggressive brother near her. If she was relaxing in bed with me at night and the other cat tried to come into bed with us, she would immediately hiss at the other cat even if the other cat wasn't actually doing anything wrong because she felt so intimidated by him and his presence all the time that she felt the need to immediately speak up and defend herself just because he was present in a space she was trying to relax in. Now they can both be in my bed at the same time. The formally aggressive cat can jump into bed right next to where the disabled cat is lying without the disabled cat getting upset or hissing or feeling the need to defend herself. It's been an amazing change in my household and I'm not even giving the cat the full amount the med says I can give! Plus this first bottle has lasted a surprisingly long amount of time. I've already been giving it more than a month and I cannot believe how much I have left. I don't even think I've used half of the bottle. I'm giving five drops mixed into the aggressive cat's wet food in the morning and again at night and every time I give them a fresh bowl of water I put seven or eight drops in the fresh bowl of water. Thank you Jackson Galaxy! I was wondering if we would ever have peace in my household again and if this poor disabled cat was ever going to have a life that didn't involve getting beat up by her brother. This med is amazing and I would recommend it to anyone having any kind of cat aggression/cat fight type issues in their household. I cannot believe the vast turnaround that it made within only 48 hours. We literally have not had an attack or a fight since this med got fully into the aggressive cat's system and we were having at least two fights a week for two plus years prior to this, despite plugins in the outlets, despite a massive CBD dosage and despite gabapentin. Nothing else worked. This medication has been a Godsend and I will definitely be continuing to buy it.