"Are Wax Melts Safe For My Pet?"
Wax Melts, much like any product containing fragrance can harm your pet - irrespective of wax type. The largest study of different waxes ever conducted recently found no real change in soot emissions between wax types. [1]
It is indeed the fragrance which can be harmful to your pooch or feline. Fragrances are made up of chemical compositions which contain natural ingredients such as Benzene, which has a sweet scent and is incredibly common in wax melts, but can cause respiratory problems in humans and pets alike.
The fragrance within wax melts can also contain a handful of a short list of allergens, which yourself or your pet may also be allergic to - the allergens can be easily found on the product packaging.
The above is true of any product containing fragrance - and you'd literally have to read the product contents to see what it can cause.
Moderation is encouraged with any fragranced product. For instance, wax melt manufacturer Nuscents have a cat at home and will eliminate particular scents from the home environment if they sense a change in him.