Dog picked up a cold the other day,and had a real bad snooty eye,joys of walking round inercity parks,asked me mam if she new any remedies,she a bit of a herbalist,put me on to apple cider vinegar,cap full on scruff of kneck and dilute 4/1 bathed the eye,dogs now fully recovered,mate had same problem with his dog and cost him 70 pound at vets