They're usually fine. They didn't even get upset on July 4 when all the fireworks were going off. This is the only time Connor and Murphy have gotten worked up over anything. Mickey is fairly new, so I don't know if he's normally jumpy with loud noises and things. And I'm pretty sure having a neighbor die is a rare thing. Especially since the people in the other 2 apartments are young and healthy. But I might try to find some of this so I'll have it on hand just in case they get upset again. Connor and Murphy have been pampered house kitties since the day they were born - they're not afraid of anything. Except the smell of death, apparently. Mickey was rescued off the streets so he might get upset more easily. This is the first time he's been freaked out, but we've only had him for a couple of months.I use "rescue remedy" for my cats when they are upset, like when i put five new cats in one of the bedrooms. They have a non alcoholic pet version, and just one drop on their wet food changes them from skittish to mellow! I use the adult version for myself, not sure how mellow I am, but it helps with anxiety.