What does a day 15-18 quitter look like??

[stitch81]

When the chick gets to the point of filling so much of the egg that all you can see is shadows, how can you tell if a day 15-18 chick is a quitter? I had one quit at day 12, there was absence of movement and the veins had disappeared, so that was easy to tell. But the later pics of chicks developing day 15-18 show pretty much just a shadow where the chick has filled up the shell.

 

[Ducker123]

when you candle the egg you could see movment on the membrane? or also if the chick hasnt pipped you could do the test where you put the egg in some warm water and it will float and you can normally see it twitching around in the water.