Thanks you two. I chose not to peroxide her eyes, since we were gone on a mini vacation, and the person house sitting for us didn't notice her eyes. I found out the morning after we got home (Monday) after hearing about all the problems. That night, the coon came back, and hubby got him. Since then, no more disappearances and no more injuries. I'll hold off on giving Tylan till I can see if she's worsening. As of right now, her one eye (left) is a bit weepy, with some scabbing under it, but not on it. Her right eye is more of a concern. No visable pus, just scabs right now, but the way it is scabbed over, I'm not sure if her eye is intact or not. I do know that she can't currently see out of it, she's holding her head cocked to one side and only looking out of her left eye. I'm very attached to this particular duckling, so crossing fingers she pulls through.
Thanks again for all your help! I know that for the next few days/weeks, I'll be checking back here regularly, giving updates and most likely pestering y'all with questions! :/