I was a bit skeptical about using this for our st Bernard x Newfoundland but it had been a life saver. He is really anxious around fireworks time and this calmed him so much, he barely reacted to the noises. Some of which were very loud. We only used the plug in and the spray (didnt use the included wipes). First used it for Bonfire night but reused it at New year. Will definitely be buying a refill plug in for this year.