I didn't even think about this until now, but I have eggs in my incubator that I found behind my house. Should I be concerned about disease? I've been told that ducklings cannot be fed medicated feed. Is this true? These ducks are pretty tame, and they look and act very healthy and normal. The water they stay in is constantly moving. I think they came from our local Atwoods, they look like the mixed lot they get there. If so they should be disease free hopefully.