Abstract: An animal tag comprises a plastics element impregnated with essential oils, with a hole therethrough, enabling attachment of the animal tag to an animal collar. The oils used may be blended. The concentration of essential oils in the plastics is between 10 and 20 percent, but is preferably about 15 percent. The animal tag can be used for example to treat fleas, ticks and other parasites; to keep the coat in good condition; to treat cuts or grazes, bites, stings, irritated skin, allergies, colds and flu; to kill bacteria and viruses on bedding and blankets; to treat arthritis, bad breath and moods.