An embryo doesn't have to squirm to be alive (but it's certainly exciting when they do!) I only toss an egg when I know it has quit. For example: If I'm on day 14 & only have about 7 days of growth. If embryo is only slightly smaller or perhaps sleeping when I candle, I leave it there.I tried to move her into a cardboard box that I could just pick up and take to the garage for hatch day. When I got home she had switched nests and the eggs were cold. She was in the wrong nest for a maximum of 12 hours. When I candled them I saw movement in 2 out of 3 eggs. I didn't pull the egg that did not squirm. I want them to hatch so badly!