I did not see her do it but one of the backyard Muscovy females laid an egg in the middle of the lawn. It's just sitting there. I did not see her lay it but found it there this morning. I don't know of any females with nests anywhere around the house. This has happened one other time a few years ago. What makes them just drop eggs in random spots like this? Is the egg viable? Should I try to hatch it? Any thoughts?