How effective is neomycin (biosol) against E Coli? A few days ago we noticed some of our 8week old fawns were showing signs of diarrhea (grayish in color and very strong sour smell, not yellow as expected from e-coli) so we started the 5 day treatment for cociddiosis, CORID. Today I got fecal results from 3 fawns that show light to moderate growth of escherichia coli. One of the fawns has just died. Will neomycin in drinking water combat E-Coli or I should I dart with baytril?