I have one that hates them, crying shaking, terrified, he was fine till he got to two year old then it started, I tried a thunder jacket which I got cheap from t.k,maxx I think it worked wonders put it on I think it was New Year's Eve and he was a different dog so it's used every firework time and he is fine with them,they are quite expensive for what they are but worked for me, it also calms the Italian greyhound down when it is having a burnout in the house, 30- 0 in 0.03 of a second