I used the collar on my 7 y/o female husky with bad separation anxiety and just anxiety in general. So far I haven’t noticed a difference. She’s been wearing it for 10 days, and had it off for a few hours when getting groomed and when she had a dental cleaning done. Otherwise it’s been on nonstop. She’s still very reactive to other dogs during walks and at the dog park, I was hoping this would help at least a little with that. She’s gotten better with other dogs over the years but she’s still very mouthy and anxious around them. I wouldn’t recommend for a typical dramatic, sassy husky. I would also argue it doesn’t help with the separation anxiety, but this might be something that can’t be fixed since she’s a rescue. I plan to leave it on her for another week or so, and if I still don’t see any changes I’ll try the diffuser and update this review as necessary.