An old rancher friend told me in the 40s they used pet milk injections for pink eye with good success according to him. Checked the web for what I could find and found this article from 1922. Thought some might find it interesting. Does anyone remember back far enough to have any input?
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2104448/?page=1
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2104448/?page=1