Ok, thanks Craig, she is on paper substrate so it's not likely to be wood substrate related, would an inspection of previous shed skins reveal a missing portion of that edge of eyecap if that was the cause? Also, is gentamicin sulfate ophthalmic solution a common topical antibiotic? I have this topical solution already, is there any harm in applying a drop in am and pm to see if there is improvement? Thanks for the quick reply