Maxi-Guard Zn4.5 Otic (4 fl oz) Zn 4.5 Otic calms sensitive ears and helps create an environment that encourages natural healing. Can be used to complement topical antibiotic or steroid therapy and to keep ears healthy after the ear infections are gone Works great against Malassezia and several other types of ear infections. Is a natural complexed zinc and boric acid, non-staining ear care formula for pets.