So she’s found her growling voice eh ha ha. I bet that shocked everyone? A collie at my agility class who is quite nervy wears one of these collars and his owner swears by it although they are a bit pricey over here in England and they need to be replaced every 4 weeks. I use the cat version spray for nervous foster cats that come into care in the cattery that you can spray onto their bedding etc. It also seems to stop unhappy cats spraying too and helped my own cats settle each time I’ve moved house.