2.5 week old Call Ducks. The one second from the right had a dark ring around its eye, and before we could start Veterycin eye wash in the past few days, the others are now developing eye gunk. They get Mazuri waterfowl crumbles with fresh water and head dunking water. Still have a brooder plate. All were assisted hatches. What else do we do? Electrolytes? Is this a sign of something more serious?