Back in the day, we used to consult a large paperback tome called "Country Women," written by back-to-the-landers, about animal husbandry and building pens and coops and such. One of the tricks I learned from it involved using a dilute solution of lemon juice - just enough lemon juice to make the water a tad acid - for pinkeye in goats and sheep, but I've used it on my own (human) kids as well. What it does is change the pH of the eye to make it inhospitable to the bacteria that cause conjunctivitis, and it works. They also recommended blackberry leaves for scours (diarrhea) in lambs and kids, and that worked, too.
Not encouraging anyone to use this if they feel uncomfortable with it; just saying what we did!