I had an out break of pink eye. I purchased a heifer and she brought it with her. I controlled it pretty well in almost all the cows. Except a yearling bull and now my best heifer. I gave her la 200 A few day’s ago and washed the eye out. It is the same blueish and watery. What should I do ? I will post pics in a while. All black angus cows. Draxxin , Nuflor gold?