One of my ducks lately has been laying eggs with little leech-like things on the outside of the shell. I can't tell if the things are alive (I don't see any visible body parts like mouth or antennae or anything), but they are somewhat uniform in shape, like a curled up slug, and about two or three millimeters long. They are red and squishy unless they have dried out. I don't know for sure if she is laying them like that, or if the red things attach after laying. The eggs are perfectly fine on the inside.
Any thoughts?
Any thoughts?