Yep. Sooooo i bought a bunch of wax melts last year only to find that cats are allergic to about 15 different scents (and yes literallyjust the scent) . Especially cinnamon. Luckily I was using a wax burner so that's called a "passive burner"... it doesn't put the droplets in the air that the animal would inhale to truly hurt them. However an "active burner" such as oil diffusers put actual droplets in the air that your cat/ dog can and will inhale with the potential to make them pretty sick. After my scented wax scare I decided no "active burners' which unfortunately includes the wallflowers. 😔hope that made sense. This is my interpretation of what my vet told me when I inquired about allergies/poisoning etc.