My 3 year old Yorkie would shake and pant uncontrollably all night long from just the sound of slight wind or rain, and fireworks, motorbikes etc would make it ten times worse. We have tried everything, even anxiety medication from the vets and nothing worked. Within the first couple of days of using this plug we noticed a huge improvement and now it’s like she is a different dog. If it is windy or rains, she will just curl up on the sofa beside you, no anxiety at all!! Worth every penny and will continue to order!