Relaxivet Cat Calming Pheromone Kit

My parents’ calico cat has been weary of all humans since she’s been spayed and became a part-time outdoor cat. Outside, she’s had run ins with stray cats and other animals (nothing too serious), but it has her on guard all the time. Unless she’s interacting with my parents, or me if I’m visiting for at least a week, she will not let you touch her and will hiss/claw. She’s actually a super sweet and loving cat but just doesn’t trust people- like she’s in a constant state of “survival” mode and constantly at least a little stressed. I believe being in nature and susceptible to the risks outdoors has made her this way. In fact, I noticed a difference the first time she leaped through the window and was lost for a night. When I finally found her in a bush that night, it was like our sweet cuddly cat didn’t know me anymore. She was in survival mode and trust was being too vulnerable. Since then, she craves the outdoors (but only in nice weather & always sleeps at home), and my parents feel strongly that her life would be deprived if she were kept indoors. I tend to agree. Hence, she’s a part-time outdoor cat, which means she has a lot of adventure and experiences but also an increased baseline stress level when it comes to interactions that require trust. Sorry for the novel but wanted to paint a picture. I got this for my parents for Christmas and within literally 15 minutes, our sweet kitty was playing in the center of the room with a room full of family and friends, including some strangers to her. She was even letting random people pet her! Like enjoying them touching her and just seemed overall way more calm and at ease. It’s still early and we’re on the first use but I don’t see how it could go wrong from here. Only positive experiences so far, and I plan to refill as soon as the insert is close to empty after reading other reviews of increased heat. I’ve also read that the insert will never look “empty” even if a refill is required so it’s important to replace within a month or so b/c looks like some people’s wicks have become overly hot (fire hazard). Again, this has not been my experience but it’s only been 2 weeks - only positive experience with this product so far.