Holistic Pet Care LLC Silver for Pets- 20 PPM 1 Gallon - for Dogs, Cats, Horses and All Pets Use in Mouth for Teeth Plaque- Safe in Ears and Eyes too. Use for Colds, Flu, Wounds, Infections Toe Nails, Hotspots, Skin Diseases, Itching Etc. How to Administer: Spray directly on wound, hotspot or infection, give by oral syringe and/or add to pets waterbowl. Dietary silver is not a heavy metal and leaves no toxicity in the system.