How do you guys know if a chick is dead inside of the egg? Are there still veins if its dead?
There will be different indicators at various stages. Early on, the vascular structure will collapse, creating a blood ring.
In week 2, the vascular structure will also collapse, and the chick will no longer be moving or anchored in the shell (when the egg is rocked gently it will look quite, what I refer to as, cloudy or soupy).
In the later stages you may be able to see the vascular structure in the upper most part of the egg (close to the air cell) is either gone, or very dark red, and you won’t see movement from the chick.
If it’s has died during lock down, the air cell will not suck down, indicating failure to get into hatching position (although sometimes it can mean they are just breach). The space by the aircell may also look yellow, or orange, where before it was dark or full of veins, and the chick will not be moving (sometimes hard to detect when the chick is that large, but you can float test when in doubt if it’s past it’s due day).