A friend of mine has cat, 10yrs old maybe, who's always had slight issues with nervousness and aggression but as of late poor Merlin seems to be getting worse. She Literally attacks anyone but her owner and cannot be in ANY sort of social situation, she's put behind closed doors for the saftey of any guests. Company seems to set off the behavior and it tends to last longer each time after everyone leaves. This poor kitty is a ball of nerves. She has tried a holistic anxiety medication with little to NO results... I found some very helpful information on a product called Serene-UM used to reduce the stress factor in cats and dogs and was just wondering if anyone has actually used this stuff?? Any info would be greatly appreciated.