I think Sooty needs Chloramphenicol 1.0% eye ointment applied 3 times a day for 5-7 days. It works better than the eye drops. Ref. BAR.I am not a vet but I volunteer for Dr. Frank Bonsack DVM of Adventure Animal Hospital as a cavy health advisor. Cheers, Ann and the Rescued Piggys of Piggyville, Tampa Florida USA.