The foamy eyes are typical of Crd. baytril,tylan,gallimycin,lincomycin and spectinomycin are all effective in suppressing bacterial infections such as CRD or Coryza, I would go the injection route, That way there is no ifs ands buts about it. As sick birds especially in this cooler weather wont consume enough medicated water to be effective
I agree with hincjc, I find terramycin useless as well.
And to Kristina, Granted, VetRx may not be made to go into the eye..But what you said is a very effective method for eye worms, Jeffers reccomends this. And with phone conversations with Dwight Schwartz, He did also