Sovereign Silver - Bio-Active Silver Hydrosol For Pets Fine Mist Spray 10 Ppm - 2 fl. oz. (59 mL) Sovereign Silver Bio Active Silver Hydrosol For Pets provides daily immune support. Sovereign Silver Bio Active Silver Hydrosol For Pets helps support a healthy immune system in dogs anc cats it also promotes the body s innate resistance to pathogens. Sovereign Silver Bio Active Silver Hydrosol supports pets with seasonal allergies.