My dogs are indifferent to vapor, but my cat... well, he LOVES it, lol... At first I always thought he was just being a cat and chasing the cloud, but soon I figured out he was actually liking it. Fruit flavors, bakery flavors, vanilla... he likes them all He also use to grab the smaller 10ml bottles and run off with them... well, he use to, that is... Now, I only use 60ml glass bottles for my personal mixes, and I keep all my flavors, VG, PG, and Nicotine in the freezer (upright, that is, lol). There's a few bottles of mixed liquids on the shelf next to my work-desk, but he doesn't bother them now that they are in glass, but he still chases the vapor around the room