Essential oils have become increasingly ... Pennyroyal oil is sometimes used in natural flea repellents, but it is extremely dangerous for dogs. Even a small amount can cause severe liver damage ...

Essential oils can be beneficial for allergies, anxiety, skin issues, arthritis, digestion, and flea and tick control in dogs. However, we must dilute the oils properly, with something like ...

avoid natural flea control products containing essential oils because some can be toxic to cats. Other pets in your home: Any product labeled for use in only dogs should never be given to a cat.