She goes and comes as she pleases, so she is still fairly healthy. And for a muscovy, she has her normal weight. We don't have any magpies around our property or even in our neighborhood, but I'll try your suggestion and see if it works!
I'm not exactly familiar with properly hatching eggs, as most of the times that I try they always fail. Currently, I have a broody duck, she has been broody for going on 4 months. Her original eggs failed so I decided to give her an egg from my first flock of ducks, however, each egg that I gave...