We have had one of our Muscovies sitting on a nest of around 7 eggs for 35 days. I know the time might be off by 1-3 days since I was not watching her 24/7 to see when she started sitting full time. I candled some of them a couple of weeks ago and saw veins and movement in one for sure. My question is how do I know if they are still alive? If they are dead, I would really like to remove them and start another hen on some eggs.