This is a fabulous product. Our rescue dog suffered terribly with separartion anxiety and have seen a calmer side to him since using this product. It does take about 2months ( for us anyway) to see a difference. It wasn’t u til we ran out one time that I noticed it fully. We never run out now. The product also lasts ages, ours is plugged in 24-7 and I only have to buy about 3 refil packs a year