"Works on stressed cat"
This collar works perfectly on an older stressed cat. After 5 years one of my male cats decided he no longer wanted to get along with one of my female cats. They still have to remain in separate rooms when I am not home but he no longer is fixated on her when I am at home. The collar took about 4 days to start working. I just purchased another 3 pack as this is the only thing that has worked for my situation.