Is Peppermint Bad For Cats. There are many essential oils that are toxic to pets, including eucalyptus oil, tea tree oil, cinnamon, citrus, pennyroyal, peppermint, pine, sweet birch, wintergreen, and ylang ylang. This is because peppermint contains a chemical called salicylate which is harmful to cats.
This is because peppermint contains a chemical called salicylate which is harmful to cats. The most common is lack of proper oral hygiene. Peppermint oil does odor good but it surely isn’t good to your cat.