Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worked For Me

I have a German Shepherd thats terrified of the slightest noise that comes out of my wood heater. He has an instant panic attack. This product didn't stop the attacks but it does seem to prevent the severe attacks and he calms down more quickly. I've use some of the pheromone collars and they did work but they loose their effectiveness quickly in the cold winter weather.